{
  "paper": {
    "school": "Henry Park",
    "year": 2022,
    "level": "P3",
    "label": "Semestral Assessment 2",
    "source_prefix": "Henry Park 2022 P3 Semestral Assessment 2",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "What is the value of digit 3 in 2305?",
      "answer0": "3",
      "answer1": "30",
      "answer2": "300",
      "answer3": "3000",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 2305, the digit 3 is in the hundreds place, so its value is 300.",
      "hints": ["Identify which place the digit 3 sits in.", "Hundreds place means 3 hundreds = 300."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "Which of the following is an acute angle?",
      "answer0": "∠a",
      "answer1": "∠b",
      "answer2": "∠c",
      "answer3": "∠d",
      "correct_answer": 2,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "An acute angle is smaller than a right angle. ∠a is a right angle, ∠b and ∠d are larger than a right angle (obtuse/reflex), and ∠c is smaller than a right angle, so the answer is ∠c.",
      "hints": ["An acute angle is smaller than a right angle (90°).", "Compare each angle to the corner of a square."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q2",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 3,
      "image_loc": "below the question stem, four labelled angles a, b, c, d in a row",
      "notes": "Figure shows four angles labelled a, b, c, d. Answer key: 3 (∠c)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which of the following is the same as 2 ℓ 40 ml?",
      "answer0": "240 ml",
      "answer1": "2004 ml",
      "answer2": "2040 ml",
      "answer3": "2400 ml",
      "correct_answer": 2,
      "skill_id": 86,
      "difficulty_id": 2,
      "explanation": "2 ℓ = 2000 ml, so 2 ℓ 40 ml = 2000 + 40 = 2040 ml.",
      "hints": ["1 ℓ = 1000 ml.", "Convert the litres to ml, then add the extra ml."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Jia Le reached the swimming pool 5 minutes after the time shown. At what time did he reach the swimming pool?",
      "answer0": "6.50 a.m.",
      "answer1": "7.00 a.m.",
      "answer2": "11.30 a.m.",
      "answer3": "11.40 a.m.",
      "correct_answer": 1,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "The clock shows 6.55. Five minutes after 6.55 is 7.00 a.m.",
      "hints": ["Read the time shown on the clock first.", "Add 5 minutes to the shown time."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q4",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 4,
      "image_loc": "centre of page, an analog clock showing about 6.55",
      "notes": "Clock reads 6.55; answer key: 2 (7.00 a.m.)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "The figure is made up of identical squares. What fraction of the figure is shaded?",
      "answer0": "1/2",
      "answer1": "1/3",
      "answer2": "3/5",
      "answer3": "3/8",
      "correct_answer": 1,
      "skill_id": 78,
      "difficulty_id": 2,
      "explanation": "The figure is a 3×2 arrangement of 6 identical squares. Shaded parts total: 1 half + 1 whole + 1 half = 2 whole squares out of 6, which is 2/6 = 1/3.",
      "hints": ["Count the shaded area in terms of whole squares.", "Two half-squares make one whole square."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 5,
      "image_loc": "below the question stem, a 3-by-2 grid of squares with some shaded/half-shaded",
      "notes": "Shaded = 2 whole squares out of 6 = 1/3; answer key: 2 (1/3)."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "The difference between two numbers is 54. The smaller number is 17. What is the sum of the two numbers?",
      "answer0": "37",
      "answer1": "54",
      "answer2": "71",
      "answer3": "88",
      "correct_answer": 3,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "Larger number = 17 + 54 = 71. Sum = 71 + 17 = 88.",
      "hints": ["Find the larger number first: smaller + difference.", "Then add the two numbers together."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "What is the missing number in the box?\n[ ? ] × 5 = 320 ÷ 4",
      "answer0": "16",
      "answer1": "64",
      "answer2": "80",
      "answer3": "400",
      "correct_answer": 0,
      "skill_id": 75,
      "difficulty_id": 2,
      "explanation": "320 ÷ 4 = 80. So box × 5 = 80, which gives box = 80 ÷ 5 = 16.",
      "hints": ["Work out the right-hand side first: 320 ÷ 4.", "Then divide that result by 5."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 1 (16)."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "Siti has 96 stickers. She has 57 fewer stickers than Carol. Brandon has three times as many stickers as Carol. How many stickers does Brandon have?",
      "answer0": "51",
      "answer1": "117",
      "answer2": "153",
      "answer3": "459",
      "correct_answer": 3,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Carol = 96 + 57 = 153. Brandon = 3 × 153 = 459.",
      "hints": ["Siti has 57 fewer than Carol, so Carol = 96 + 57.", "Brandon has 3 times Carol's amount."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 4 (459)."
    },
    {
      "n": 9,
      "type_id": 1,
      "question": "The figure is made up of 2 identical small rectangles. Find the perimeter of the figure.",
      "answer0": "9 cm",
      "answer1": "18 cm",
      "answer2": "26 cm",
      "answer3": "31 cm",
      "correct_answer": 2,
      "skill_id": 96,
      "difficulty_id": 3,
      "explanation": "The whole figure is a rectangle 8 cm (two 4 cm widths) by 5 cm. Perimeter = 2 × (8 + 5) = 26 cm.",
      "hints": ["The two small rectangles together form one big rectangle 8 cm by 5 cm.", "Perimeter of a rectangle = 2 × (length + breadth)."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 6,
      "image_loc": "middle of page, a rectangle split into two by a dashed line, 4 cm width marked on top and 5 cm height on right",
      "notes": "Big rectangle 8 cm x 5 cm; perimeter 26 cm; answer key: 3 (26 cm)."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Write nine thousand and seven in numerals.\n[?]",
      "answer0": "9007",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Nine thousand = 9000, and seven ones = 7, with no hundreds or tens, so 9007.",
      "hints": ["Nine thousand is 9000.", "Fill empty hundreds and tens places with 0."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 9007."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "There are some water in the two beakers. What is the total volume of water in the two beakers? Give your answer in ml.\n[?] ml",
      "answer0": "1400",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "The beakers contain 800 ml and 600 ml of water. Total = 800 + 600 = 1400 ml.",
      "hints": ["Read the water level on each beaker scale.", "Add the two volumes together."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q11",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 7,
      "image_loc": "left-centre of page, two beakers each marked 1 ℓ with water levels shaded",
      "notes": "Beakers show 800 ml and 600 ml; total 1400 ml per answer key."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "The opening hours of ABC Bakery is shown. How long is the bakery opened each day? Give your answer in hours and minutes.\n[?] h [?] min",
      "answer0": "5",
      "answer1": "45",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "Open 9.45 a.m. to 3.30 p.m. From 9.45 a.m. to 3.45 p.m. is 6 h; back 15 min to 3.30 p.m. gives 5 h 45 min.",
      "hints": ["Count the hours from 9.45 a.m. to 3.45 p.m.", "Adjust for the 15 minutes before 3.45 p.m."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q12",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 7,
      "image_loc": "lower-left, an oval sign reading 'ABC Bakery Opens Daily from 9.45 a.m. to 3.30 p.m.'",
      "notes": "Duration 9.45 a.m. to 3.30 p.m. = 5 h 45 min per answer key. Times are given in the oval sign text."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Jamie bought a storybook and a pen from a bookshop. How much did she spend altogether?\nStorybook $15.90, Pen $2.75\nAns: $[?]",
      "answer0": "18.65",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "$15.90 + $2.75 = $18.65.",
      "hints": ["Add the two prices together.", "Line up the decimal points when adding money."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q13",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 8,
      "image_loc": "upper area, a storybook ($15.90) and a pen ($2.75) shown side by side",
      "notes": "Prices ($15.90, $2.75) are in the image labels and the stem; total $18.65 per answer key."
    },
    {
      "n": 14,
      "type_id": 1,
      "question": "Look at the figure. Name a line perpendicular to line AB.",
      "answer0": "Line CD",
      "answer1": "Line EF",
      "answer2": "Line GH",
      "answer3": "Line CF",
      "correct_answer": 2,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "On the grid, line GH meets line AB at a right angle, so line GH is perpendicular to line AB.",
      "hints": ["Perpendicular lines meet at a right angle.", "Check which line crosses AB forming a square corner."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q14",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 8,
      "image_loc": "lower half, a square grid with several labelled lines (A,B,C,D,E,F,G,H)",
      "notes": "Word answer converted to MCQ (4 line-name options). Answer key: Line GH. Distractors are other lines drawn on the grid."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "Find the value of 1/5 + 3/10 . Give your answer in its simplest form.\n[?]",
      "answer0": "1/2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "1/5 = 2/10, so 2/10 + 3/10 = 5/10 = 1/2.",
      "hints": ["Make the denominators the same: 1/5 = 2/10.", "Add the numerators, then simplify."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key works: 2/10 + 3/10 = 5/10 = 1/2."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "Find the product of 306 and 7.\n[?]",
      "answer0": "2142",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 75,
      "difficulty_id": 1,
      "explanation": "306 × 7 = 2142.",
      "hints": ["Product means multiply.", "Multiply 306 by 7."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 306 x 7 = 2142."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "Use the digits 5, 0, 4, and 9 to form the smallest 4-digit even number.\n[?]",
      "answer0": "4590",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 3,
      "explanation": "Smallest 4-digit number uses smallest non-zero digit first; for an even number the last digit must be even. Arranging 5,0,4,9 to be smallest and even gives 4590 (ends in 0).",
      "hints": ["The first digit must be the smallest non-zero digit, and an even number ends in 0, 2, 4, 6 or 8.", "Try ending in 0, then arrange the rest from smallest to largest."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 4590."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "What is the quotient when 305 is divided by 8?\n[?]",
      "answer0": "38",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "305 ÷ 8 = 38 remainder 1. The quotient is 38.",
      "hints": ["Quotient is the whole-number result of the division.", "8 × 38 = 304, with 1 left over."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 38 (remainder ignored as question asks quotient)."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "(a) Express 8/12 in its simplest form.\n(b) Give an equivalent fraction of 4/9 .\n(a) [?] (b) [?]",
      "answer0": "2/3",
      "answer1": "8/18",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 80,
      "difficulty_id": 2,
      "explanation": "(a) 8/12 = (8÷4)/(12÷4) = 2/3. (b) An equivalent fraction of 4/9 is 8/18 (multiply numerator and denominator by 2).",
      "hints": ["Divide top and bottom by their common factor to simplify.", "Multiply top and bottom by the same number to get an equivalent fraction."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q19",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: (a) 2/3, (b) 8/18 (any valid equivalent fraction accepted)."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "Jerry used 4 identical square tiles to form a rectangle. Each side of the square tile is 3 cm. What is the area of the rectangle formed?\n[?] cm²",
      "answer0": "36",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 97,
      "difficulty_id": 2,
      "explanation": "Each tile is 3 cm by 3 cm = 9 cm². Four tiles in a row form a rectangle of area 4 × 9 = 36 cm².",
      "hints": ["Area of one square tile = side × side.", "Multiply by the number of tiles."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q20",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 10,
      "image_loc": "upper-centre, a rectangle divided into 4 equal squares in a row, 3 cm marked on one square",
      "notes": "Answer key: 4 x (3x3) = 36 cm²."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "The bar graph shows the number of shirts sold over 5 days. How many more shirts were sold on Wednesday than on Tuesday?\n[?]",
      "answer0": "16",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Wednesday = 40 shirts, Tuesday = 24 shirts. Difference = 40 − 24 = 16.",
      "hints": ["Read the bar heights for Wednesday and Tuesday.", "Subtract the smaller from the larger."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q21",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 11,
      "image_loc": "upper half, a vertical bar graph titled Number of Shirts for Mon-Fri",
      "notes": "Wed 40, Tue 24; 40-24 = 16 per answer key."
    },
    {
      "n": 22,
      "type_id": 2,
      "question": "Complete the number pattern.\n4756, 4759, 4758, 4761, [?], 4763, 4762",
      "answer0": "4760",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "The pattern alternates +3 then −1: 4756 +3=4759 −1=4758 +3=4761 −1=4760 +3=4763 −1=4762. The missing number is 4760.",
      "hints": ["Look at how the numbers go up then down.", "The rule is add 3, then subtract 1, repeating."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q22",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 4760."
    },
    {
      "n": 23,
      "type_id": 2,
      "question": "150 more than the product of 325 and 8 is [?] .",
      "answer0": "2750",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "325 × 8 = 2600. 2600 + 150 = 2750.",
      "hints": ["Find the product 325 × 8 first.", "Then add 150."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q23",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 325x8=2600, +150 = 2750."
    },
    {
      "n": 24,
      "type_id": 2,
      "question": "Find the sum of 6491 and 1355. In your answer, what is the digit in the hundreds place?\n[?]",
      "answer0": "8",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "6491 + 1355 = 7846. The digit in the hundreds place is 8.",
      "hints": ["Add the two numbers first.", "Identify the hundreds-place digit in the sum."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q24",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "6491+1355=7846; hundreds digit 8 per answer key."
    },
    {
      "n": 25,
      "type_id": 2,
      "question": "[ ? ] ÷ 7 = 68 R1\nFind the missing number in the box.\n[?]",
      "answer0": "477",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "68 × 7 = 476, then add the remainder 1 to get 477.",
      "hints": ["Multiply the quotient by the divisor: 68 × 7.", "Add the remainder of 1."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q25",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 68x7=476, 476+1=477."
    },
    {
      "n": 26,
      "type_id": 2,
      "question": "Miss Chin baked 903 muffins. She sold some of the muffins and had 276 muffins left. How many muffins did she sell?\n[?]",
      "answer0": "627",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "Muffins sold = 903 − 276 = 627.",
      "hints": ["Sold = total baked minus what is left.", "903 − 276."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q26",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 903-276=627."
    },
    {
      "n": 27,
      "type_id": 2,
      "question": "Oranges are sold in bags of 8 in a supermarket. Mrs Koh needs 485 oranges. What is the smallest number of bags of oranges Mrs Koh should buy?\n[?]",
      "answer0": "61",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "485 ÷ 8 = 60 R5. 60 bags give only 480 oranges, so she needs 1 more bag, giving 61 bags.",
      "hints": ["Divide 485 by 8 and look at the remainder.", "If there is a remainder, round up to the next whole bag."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q27",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 61."
    },
    {
      "n": 28,
      "type_id": 2,
      "question": "Arrange the following fractions from the smallest to the largest.\n5/9 , 1/3 , 5/6\n[?] , [?] , [?]",
      "answer0": "1/3",
      "answer1": "5/9",
      "answer2": "5/6",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 3,
      "explanation": "Using common denominator 18: 1/3 = 6/18, 5/9 = 10/18, 5/6 = 15/18. Smallest to largest: 1/3, 5/9, 5/6.",
      "hints": ["Convert all to the same denominator (18).", "Compare the numerators to order them."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q28",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task as FIB, smallest to largest. Answer key: 1/3, 5/9, 5/6."
    },
    {
      "n": 29,
      "type_id": 2,
      "question": "11/12 − [ ? ]/3 = 1/4\nWhat is the missing number in the box?\n[?]",
      "answer0": "2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 3,
      "explanation": "11/12 − 1/4 = 11/12 − 3/12 = 8/12 = 2/3. So box/3 = 2/3, meaning the box is 2.",
      "hints": ["Work out 11/12 − 1/4 first.", "Compare the result to ?/3 to find the missing numerator."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q29",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Box is the numerator over 3. Answer key: 2."
    },
    {
      "n": 30,
      "type_id": 2,
      "question": "Hamid's house is 3 km away from a library and 1980 m away from a playground. What is the distance between the library and the playground?\n[?] m",
      "answer0": "1020",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "3 km = 3000 m. The library is 3000 m from the house, and the playground is 1980 m from the house along the way. Distance between = 3000 − 1980 = 1020 m.",
      "hints": ["Convert 3 km to metres.", "Subtract the house-to-playground distance from the house-to-library distance."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q30",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 13,
      "image_loc": "centre, a line diagram: Hamid's house — 1980 m — playground — ? — library",
      "notes": "Layout: house to playground 1980 m, house to library 3 km (=3000 m) total. 3000-1980=1020 m per answer key."
    },
    {
      "n": 31,
      "type_id": 2,
      "question": "The figure is made up of three identical triangles and a square. Each side of the triangle has the same length. What is the perimeter of the figure?\n[?] cm",
      "answer0": "49",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 96,
      "difficulty_id": 3,
      "explanation": "Each triangle side = square side = 7 cm. The outline of the figure is made up of 7 sides of length 7 cm, so perimeter = 7 × 7 = 49 cm.",
      "hints": ["All sides shown are equal to 7 cm.", "Count how many 7 cm edges form the outer boundary."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q31",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 14,
      "image_loc": "upper-centre, a square with a triangle on top and a triangle on each side, 7 cm marked on the base",
      "notes": "Answer key: 7x7=49 cm."
    },
    {
      "n": 32,
      "type_id": 0,
      "question": "Use a set-square to draw a line parallel to line AB in the grid.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "Draw any line that runs in the same direction (same slope) as AB but does not touch it.",
      "hints": [],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q32",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 12,
      "image_loc": "lower half, a square grid with a slanted line AB drawn from A (upper-left) to B (lower-right)",
      "notes": "Draw-a-line task (interactive) — no app question type, type_id 0, will be skipped on insert. Answer key blank (drawing). Expected: any line parallel to AB."
    },
    {
      "n": 33,
      "type_id": 1,
      "question": "The bar graph shows the number of marks 4 girls scored in a test. Who scored twice the number of marks Geetha scored?",
      "answer0": "Kim",
      "answer1": "Isabel",
      "answer2": "Halimah",
      "answer3": "Geetha",
      "correct_answer": 0,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Geetha scored 44 marks. Twice 44 = 88, which is Kim's score, so the answer is Kim.",
      "hints": ["Read Geetha's bar, then double that value.", "Find the girl whose bar matches the doubled value."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q33",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 15,
      "image_loc": "upper half, a horizontal bar graph of marks for Kim, Isabel, Halimah, Geetha",
      "notes": "Word answer (a name) converted to MCQ with the 4 girls as options. Answer key: Kim. Geetha 44, Kim 88 (twice)."
    },
    {
      "n": 34,
      "type_id": 2,
      "question": "Mrs. Ang is 47 years old now. Kayla is 28 years younger than Mrs Ang. How old will Kayla be in 10 years' time?\n[?] years old",
      "answer0": "29",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Kayla now = 47 − 28 = 19. In 10 years = 19 + 10 = 29 years old.",
      "hints": ["Find Kayla's age now first.", "Add 10 to find her age in 10 years."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q34",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 47-28=19, 19+10=29 years old."
    },
    {
      "n": 35,
      "type_id": 2,
      "question": "Emma made 7 necklaces by using 84 beads for each necklace. She had 265 beads left after making the 7 necklaces.\n(a) How many beads did Emma use in total to make the necklaces?\n(b) How many beads did Emma have at first?\n(a) [?] (b) [?]",
      "answer0": "588",
      "answer1": "853",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "(a) Beads used = 84 × 7 = 588. (b) Beads at first = beads used + beads left = 588 + 265 = 853.",
      "hints": ["Multiply beads per necklace by the number of necklaces.", "Add the leftover beads to find the starting amount."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q35",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: (a) 84x7=588, (b) 588+265=853."
    },
    {
      "n": 36,
      "type_id": 2,
      "question": "The mass of a box and 6 identical metal balls is 1 kg 92 g. The mass of the box is 120 g.\n(a) What is the mass of the 6 metal balls?\n(b) What is the mass of each metal ball?\n(a) [?] g (b) [?] g",
      "answer0": "972",
      "answer1": "162",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "1 kg 92 g = 1092 g. (a) Mass of 6 balls = 1092 − 120 = 972 g. (b) Each ball = 972 ÷ 6 = 162 g.",
      "hints": ["Convert 1 kg 92 g to grams (1092 g), then subtract the box mass.", "Divide the total ball mass by 6."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q36",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: (a) 1092-120=972 g, (b) 972/6=162 g."
    },
    {
      "n": 37,
      "type_id": 2,
      "question": "The table shows the amount of time Mei spent on her homework last Saturday.\nEnglish 10 minutes, Mathematics 25 minutes, Science 15 minutes, Mother Tongue 30 minutes\n(a) Mei finished her Mathematics and Science homework at 9.30 a.m. At what time did she start doing her Mathematics and Science homework?\n(b) How much time did she take in total to complete her English, Mathematics and Mother Tongue homework? Express your answer in hour(s) and minute(s).\n(a) [?] (b) [?] h [?] min",
      "answer0": "8.50 a.m.",
      "answer1": "1",
      "answer2": "5",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 93,
      "difficulty_id": 3,
      "explanation": "(a) Maths + Science = 25 + 15 = 40 min. 9.30 a.m. minus 40 min = 8.50 a.m. (b) English + Maths + Mother Tongue = 10 + 25 + 30 = 65 min = 1 h 5 min.",
      "hints": ["For (a) add the two homework times, then count back from 9.30 a.m.", "For (b) add three times in minutes, then convert to hours and minutes."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q37",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Table data is in the stem. Answer key: (a) 8.50 a.m. (9.30 - 40min), (b) 65 min = 1 h 5 min. answer1/answer2 hold the h and min blanks."
    },
    {
      "n": 38,
      "type_id": 2,
      "question": "Wendy bought 3 similar T-shirts and 2 similar skirts for $50.20. 1 such T-shirt and 1 such skirt cost $20.20. How much did each T-shirt cost?\nAns: $[?]",
      "answer0": "9.80",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 3,
      "explanation": "2 T-shirts + 2 skirts = 2 × $20.20 = $40.40. So 1 extra T-shirt = $50.20 − $40.40 = $9.80. Each T-shirt costs $9.80.",
      "hints": ["2 sets of (1 T-shirt + 1 skirt) cost 2 × $20.20.", "Subtract that from $50.20 to find the cost of the remaining T-shirt."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q38",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key working: $50.20 - $40.40 = $9.80 (key writes 5020-2020=3000 cents style then 30.00-20.20=9.80)."
    },
    {
      "n": 39,
      "type_id": 2,
      "question": "Melody had 120 stamps more than Jeremy. After Melody gave 30 stamps to Jeremy, she had twice as many stamps as him. How many stamps did they have altogether?\nAns: [?]",
      "answer0": "300",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "After giving 30 stamps, Melody is 120 − 30 − 30 = 60 more than Jeremy. Twice as many means the difference equals Jeremy's amount, so Jeremy then has 90. Total = 90 + 180 = 270; adding back, total stays 270 + 30 = 300 altogether.",
      "hints": ["After the transfer, the difference between them is 120 − 60 = 60.", "If Melody has twice Jeremy's stamps, that difference equals Jeremy's amount."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q39",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key working: 120-30=90; 90=1u; 3u=90x3=270; 270+30=300. Total altogether 300."
    },
    {
      "n": 40,
      "type_id": 2,
      "question": "The total number of stickers five children have is the same as the total number of stickers two adults have. The five children and two adults have a total of 470 stickers.\n(a) How many stickers do the two adults have altogether?\n(b) Each of the five children has the same number of stickers. Find the number of stickers each child has.\n(a) [?] (b) [?]",
      "answer0": "235",
      "answer1": "47",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "(a) Children's total = adults' total, and together they are 470, so each group has 470 ÷ 2 = 235. The two adults have 235. (b) Five children share 235 equally: 235 ÷ 5 = 47 stickers each.",
      "hints": ["The two groups are equal and add to 470, so split 470 in half.", "Divide the children's total by 5."],
      "source": "Henry Park 2022 P3 Semestral Assessment 2 Q40",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: (a) 470/2=235, (b) 235/5=47."
    }
  ]
}