{
  "paper": {
    "school": "ACS Primary",
    "year": 2022,
    "level": "P3",
    "label": "Semestral Assessment 2",
    "source_prefix": "ACS Primary 2022 P3 Semestral Assessment 2",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "In the number 8273, the digit __________ is in the tens place.",
      "answer0": "7",
      "answer1": "2",
      "answer2": "3",
      "answer3": "8",
      "correct_answer": 0,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 8273 the digits from the right are 3 (ones), 7 (tens), 2 (hundreds), 8 (thousands). So the tens digit is 7.",
      "hints": ["The tens place is the second digit from the right.", "8273: 3 is ones, then comes the tens."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: (1) = 7."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "How many hundreds are there in 7200?",
      "answer0": "720",
      "answer1": "200",
      "answer2": "72",
      "answer3": "20",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "7200 ÷ 100 = 72, so there are 72 hundreds in 7200.",
      "hints": ["Divide 7200 by 100.", "7200 = 72 × 100."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: (3) = 72."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "The capacity of the 1-litre flask is the same as the capacity of 5 glasses. 8 glasses of water are poured into the bucket. What is the volume of water in the bucket?",
      "answer0": "800 ml",
      "answer1": "1300 ml",
      "answer2": "1500 ml",
      "answer3": "1600 ml",
      "correct_answer": 3,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "5 glasses = 1 litre = 1000 ml, so 1 glass = 200 ml. 8 glasses = 8 × 200 ml = 1600 ml.",
      "hints": ["First find the volume of 1 glass: 1000 ml ÷ 5.", "Then multiply by 8 glasses."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q3",
      "image_needed": true,
      "image_page": 3,
      "image_loc": "middle of page, below the question: 5 glasses pointing to a flask, and 8 glasses pointing to a bucket",
      "image_options": false,
      "image_file": "q3.png",
      "notes": "Key: (4) = 1600 ml."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Find the sum of 10 hundreds and 23 ones.",
      "answer0": "33",
      "answer1": "123",
      "answer2": "330",
      "answer3": "1023",
      "correct_answer": 3,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "10 hundreds = 1000 and 23 ones = 23. Sum = 1000 + 23 = 1023.",
      "hints": ["10 hundreds = 10 × 100 = 1000.", "Add 23 to 1000."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: (4) = 1023."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "Find the product of 172 and 4.",
      "answer0": "688",
      "answer1": "488",
      "answer2": "313",
      "answer3": "43",
      "correct_answer": 0,
      "skill_id": 75,
      "difficulty_id": 2,
      "explanation": "172 × 4 = 688.",
      "hints": ["Product means multiply.", "Multiply 172 by 4."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: (1) = 688."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Which of the following has the same value as 5 × 6?",
      "answer0": "5 + 5 + 5 + 5 + 5",
      "answer1": "6 + 6 + 6 + 6 + 6",
      "answer2": "5 × 5 × 5 × 5 × 5",
      "answer3": "6 × 6 × 6 × 6 × 6",
      "correct_answer": 1,
      "skill_id": 73,
      "difficulty_id": 1,
      "explanation": "5 × 6 means 6 added 5 times: 6 + 6 + 6 + 6 + 6 = 30.",
      "hints": ["Multiplication is repeated addition.", "5 × 6 = 6 added five times."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: (2) = 6 + 6 + 6 + 6 + 6."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "There are 4 figures. Which of the figures has only one acute angle?",
      "answer0": "A",
      "answer1": "B",
      "answer2": "C",
      "answer3": "D",
      "correct_answer": 3,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "Figure D (the trapezium drawn) has exactly one acute angle. A has two right angles, B (right triangle) has two acute angles, C (parallelogram) has two acute angles.",
      "hints": ["An acute angle is smaller than a right angle.", "Count the acute angles in each figure; only one figure has exactly one."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q7",
      "image_needed": true,
      "image_page": 5,
      "image_loc": "upper-middle of page, four labelled figures A, B, C, D in a 2x2 arrangement",
      "image_options": false,
      "image_file": "q7.png",
      "notes": "Key: (4) = D. Options are text labels; the shared figure shows the four shapes."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "Which fraction is not equivalent to 2/3?",
      "answer0": "2/6",
      "answer1": "4/6",
      "answer2": "6/9",
      "answer3": "8/12",
      "correct_answer": 0,
      "skill_id": 77,
      "difficulty_id": 2,
      "explanation": "4/6, 6/9 and 8/12 all simplify to 2/3. 2/6 = 1/3, which is not equivalent to 2/3.",
      "hints": ["Simplify each fraction.", "2/6 reduces to 1/3, not 2/3."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: (1) = 2/6."
    },
    {
      "n": 9,
      "type_id": 1,
      "question": "What is the total volume of water in litres and millilitres?",
      "answer0": "1 ℓ 100 mℓ",
      "answer1": "1 ℓ 130 mℓ",
      "answer2": "1 ℓ 200 mℓ",
      "answer3": "1 ℓ 600 mℓ",
      "correct_answer": 1,
      "skill_id": 85,
      "difficulty_id": 2,
      "explanation": "Beaker 1 shows 800 ml, beaker 2 shows about 250 ml and beaker 3 shows about 80 ml; together 800 + 250 + 80 = 1130 ml = 1 ℓ 130 mℓ.",
      "hints": ["Read the water level in each beaker.", "Add the three volumes and convert to litres and millilitres."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q9",
      "image_needed": true,
      "image_page": 6,
      "image_loc": "middle of page, three graduated beakers showing different water levels",
      "image_options": false,
      "image_file": "q9.png",
      "notes": "Key: (2) = 1 ℓ 130 mℓ. Total 1130 ml."
    },
    {
      "n": 10,
      "type_id": 1,
      "question": "What is the actual time of the clock?",
      "answer0": "45 minutes to 3",
      "answer1": "45 minutes to 4",
      "answer2": "15 minutes past 5",
      "answer3": "15 minutes past 4",
      "correct_answer": 3,
      "skill_id": 89,
      "difficulty_id": 2,
      "explanation": "The minute hand points to 3 (15 minutes) and the hour hand is just past 4, so the time is 15 minutes past 4.",
      "hints": ["The minute hand on 3 means 15 minutes.", "The hour hand is just after 4."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q10",
      "image_needed": true,
      "image_page": 7,
      "image_loc": "upper-left of page, an analogue clock face below the question",
      "image_options": false,
      "image_file": "q10.png",
      "notes": "Key: (4) = 15 minutes past 4."
    },
    {
      "n": 11,
      "type_id": 1,
      "question": "Write three thousand, eight hundred and fifty in numerals.",
      "answer0": "3850",
      "answer1": "3805",
      "answer2": "30850",
      "answer3": "385",
      "correct_answer": 0,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Three thousand = 3000, eight hundred = 800, fifty = 50. 3000 + 800 + 50 = 3850.",
      "hints": ["Break it into thousands, hundreds, tens.", "3000 + 800 + 50."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 3850. Word answer -> rendered as MCQ with distractors per spec."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "Arrange the numbers from smallest to greatest. 7213 , 1372 , 7321 , 3127 [?] , [?] , [?] , [?]",
      "answer0": "1372",
      "answer1": "3127",
      "answer2": "7213",
      "answer3": "7321",
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "Comparing thousands then hundreds: 1372 < 3127 < 7213 < 7321.",
      "hints": ["Compare the thousands digit first.", "1 < 3 < 7; for the two 7-thousands compare the hundreds."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1372, 3127, 7213, 7321 (smallest first). Ordering task -> FIB with one blank per position."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Study the number pattern. What is the missing number? 3898, 3968, [?] , 4108, 4178",
      "answer0": "4038",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "The numbers increase by 70 each time: 3898, 3968, 4038, 4108, 4178. The missing number is 4038.",
      "hints": ["Find the difference between consecutive terms.", "Each term is 70 more than the previous."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 4038."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Sally had some oranges. After selling 140 oranges, she had 835 oranges left. How many oranges did she have at first? [?]",
      "answer0": "975",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 1,
      "explanation": "At first = sold + left = 140 + 835 = 975 oranges.",
      "hints": ["Add the oranges sold to the oranges left.", "140 + 835."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 975."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "What is the greatest 2-digit number that can be divided by 4 without any remainder? [?]",
      "answer0": "96",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "The greatest 2-digit number is 99. 96 = 4 × 24 is the largest 2-digit multiple of 4.",
      "hints": ["Start from 99 and go down.", "Look for the largest multiple of 4 below 100."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 96."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "What is the missing fraction in the box? Express your answer in its simplest form. 3/4 + 1/12 = [?]",
      "answer0": "5/6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "3/4 = 9/12. 9/12 + 1/12 = 10/12 = 5/6.",
      "hints": ["Change 3/4 to twelfths.", "9/12 + 1/12 = 10/12, then simplify."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 5/6."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "The time shown on the clock is [?] a.m.",
      "answer0": "7.57",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 88,
      "difficulty_id": 2,
      "explanation": "The hour hand is just before 8 and the minute hand points near 57 minutes (just before 12), giving 7.57 a.m.",
      "hints": ["The hour hand is almost at 8.", "Read the minutes carefully — just before the hour."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q17",
      "image_needed": true,
      "image_page": 13,
      "image_loc": "centre-top of page, an analogue clock face below the question",
      "image_options": false,
      "image_file": "q17.png",
      "notes": "Key: 7.57 a.m. Answer stored as 7.57 (the 'a.m.' is fixed in the stem)."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "What is the missing number in the box? 4/12 = 1/[?]",
      "answer0": "3",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 78,
      "difficulty_id": 1,
      "explanation": "4/12 simplifies to 1/3, so the missing denominator is 3.",
      "hints": ["Simplify 4/12.", "Divide numerator and denominator by 4."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 3. The single blank is the missing denominator of 1/[?]."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "Find the remainder when 157 is divided by 9. [?]",
      "answer0": "4",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "157 ÷ 9 = 17 remainder 4 (since 9 × 17 = 153 and 157 − 153 = 4).",
      "hints": ["9 × 17 = 153.", "Subtract 153 from 157."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q19",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 4."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "What is 8003 − 1975? [?]",
      "answer0": "6028",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "8003 − 1975 = 6028.",
      "hints": ["Subtract with regrouping.", "8003 − 1975."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q20",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 6028."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "Which two of the fractions are smaller than 1/2? 2/8 , 3/9 , 8/10 , 9/12 [?] , [?]",
      "answer0": "2/8",
      "answer1": "3/9",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "2/8 = 1/4 and 3/9 = 1/3 are both less than 1/2. 8/10 and 9/12 (= 3/4) are greater than 1/2.",
      "hints": ["Compare each fraction to 1/2.", "A fraction is less than 1/2 when the numerator is less than half the denominator."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q21",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2/8 and 3/9. Two-answer FIB."
    },
    {
      "n": 22,
      "type_id": 2,
      "question": "Find the perimeter of Figure A. [?]",
      "answer0": "18",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 96,
      "difficulty_id": 2,
      "explanation": "Figure A is an L-shaped rectilinear figure on a 1 cm grid; tracing its sides gives a total perimeter of 18 cm.",
      "hints": ["Each grid square is 1 cm.", "Count all the unit edges around the boundary of the L-shape."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q22",
      "image_needed": true,
      "image_page": 14,
      "image_loc": "middle of page, an L-shaped figure labelled A drawn on a square grid with 1 cm scale markers",
      "image_options": false,
      "image_file": "q22.png",
      "notes": "Key: 18 cm. Unit is cm (fixed by 'cm' after answer blank)."
    },
    {
      "n": 23,
      "type_id": 2,
      "question": "How much more water must be added to make 1 litre? [?]",
      "answer0": "400",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "The beaker shows 600 ml of water. 1 litre = 1000 ml, so 1000 − 600 = 400 ml more is needed.",
      "hints": ["Read the water level: 600 ml.", "1000 ml − 600 ml."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q23",
      "image_needed": true,
      "image_page": 15,
      "image_loc": "upper-middle of page, a graduated beaker marked 1 ℓ and 500 ml with water filled to about 600 ml",
      "image_options": false,
      "image_file": "q23.png",
      "notes": "Key: 400 ml. Beaker shows 600 ml. Unit ml fixed after blank."
    },
    {
      "n": 24,
      "type_id": 2,
      "question": "How many sides and angles does the figure have? Number of sides: [?] Number of angles: [?]",
      "answer0": "5",
      "answer1": "5",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 1,
      "explanation": "The pentagon-shaped figure (home-plate shape) has 5 sides and 5 angles.",
      "hints": ["Count the straight edges.", "A figure has the same number of angles as sides."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q24",
      "image_needed": true,
      "image_page": 15,
      "image_loc": "left column of a table, a pentagon (house/home-plate) shape drawn on a dot grid",
      "image_options": false,
      "image_file": "q24.png",
      "notes": "Key: sides 5, angles 5. Two blanks: sides then angles."
    },
    {
      "n": 25,
      "type_id": 2,
      "question": "Mrs Tan prepared 104 lunch boxes. She packed 8 lunch boxes in each plastic bag. How many plastic bags did Mrs Tan use? [?]",
      "answer0": "13",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "104 ÷ 8 = 13 plastic bags.",
      "hints": ["Divide the total lunch boxes by 8.", "104 ÷ 8."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q25",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 13."
    },
    {
      "n": 26,
      "type_id": 2,
      "question": "3574 people went to Sentosa on Saturday and 199 fewer people went on Sunday than Saturday. How many people went to Sentosa on these two days? [?]",
      "answer0": "6949",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "Sunday = 3574 − 199 = 3375. Two days = 3574 + 3375 = 6949.",
      "hints": ["First find Sunday's number: 3574 − 199.", "Then add Saturday and Sunday together."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q26",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 6949."
    },
    {
      "n": 27,
      "type_id": 2,
      "question": "What is the missing number in the box? 2 6 7 9 + 5 7 [?] 8 = 8 4 0 7",
      "answer0": "2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "8407 − 2679 = 5728, so the addend is 5728 and the missing tens digit is 2.",
      "hints": ["Subtract 2679 from 8407 to find the addend.", "The result 5728 fills the second number; the box is the tens digit."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q27",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2. Column addition with one missing digit (the tens place of 57[?]8)."
    },
    {
      "n": 28,
      "type_id": 2,
      "question": "Find the difference between 11/12 and 1/4. Give your answer in its simplest form. [?]",
      "answer0": "2/3",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "1/4 = 3/12. 11/12 − 3/12 = 8/12 = 2/3.",
      "hints": ["Change 1/4 to twelfths.", "11/12 − 3/12, then simplify."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q28",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2/3."
    },
    {
      "n": 29,
      "type_id": 2,
      "question": "There are 10 lamp posts along Oxford Road. The distance between every two lamp posts is 70 m. What is the distance between the first and the last lamp post? [?]",
      "answer0": "630",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "10 lamp posts have 10 − 1 = 9 gaps. Distance = 9 × 70 m = 630 m.",
      "hints": ["The number of gaps is one less than the number of posts.", "9 gaps × 70 m."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q29",
      "image_needed": true,
      "image_page": 17,
      "image_loc": "upper-middle of page, a row of lamp posts labelled First, Second, Third ... Last with 70 m gaps",
      "image_options": false,
      "image_file": "q29.png",
      "notes": "Key: 630 m. Unit m fixed after blank."
    },
    {
      "n": 30,
      "type_id": 2,
      "question": "Form the greatest 4-digit even number using all the digits shown. 2 9 1 4 [?]",
      "answer0": "9412",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 3,
      "explanation": "For the greatest even number, the last digit must be even (2 or 4). Use the largest digits in front: 9, 4, 1 then end with 2 -> 9412.",
      "hints": ["An even number ends in an even digit.", "Put the largest digits first, leaving an even digit for the ones place."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q30",
      "image_needed": true,
      "image_page": 17,
      "image_loc": "middle of page, four digit cards showing 2, 9, 1, 4",
      "image_options": false,
      "image_file": "q30.png",
      "notes": "Key: 9412. Digits 2,9,1,4 shown on cards; figure included for reference but digits are in the stem."
    },
    {
      "n": 31,
      "type_id": 2,
      "question": "Mrs Raja sold 285 roses last week. She sold 5 times as many roses this week. How many roses did she sell this week? [?]",
      "answer0": "1425",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "This week = 5 × 285 = 1425 roses.",
      "hints": ["5 times as many means multiply by 5.", "285 × 5."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q31",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1425. Stem spans two pages (pp.17-18); combined verbatim."
    },
    {
      "n": 32,
      "type_id": 2,
      "question": "A box can contain 5 muffins. What is the least number of boxes needed to contain 119 muffins? [?]",
      "answer0": "24",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "119 ÷ 5 = 23 remainder 4. The leftover 4 muffins still need 1 more box, so 23 + 1 = 24 boxes.",
      "hints": ["Divide 119 by 5 and look at the remainder.", "Any remainder needs one extra box."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q32",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 24."
    },
    {
      "n": 33,
      "type_id": 0,
      "question": "The bar graph shows the favourite sports of class 4J. Each pupil can only choose 1 sport. (a) The least favourite sport is [?]. (b) How many pupils like swimming and soccer altogether?",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "(a) Running has the fewest pupils (5), so it is the least favourite sport. (b) Swimming 9 + Soccer 12 = 21 pupils.",
      "hints": ["Find the shortest bar for the least favourite sport.", "Add the swimming and soccer bar values."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q33",
      "image_needed": true,
      "image_page": 19,
      "image_loc": "upper half of page, a vertical bar graph titled 'Favourite Sports' with bars for Basketball, Running, Swimming, Netball, Soccer",
      "image_options": false,
      "image_file": "q33.png",
      "notes": "type_id 0: two-part question (a word answer 'Running' + a numeric answer 21) cannot be a single value/sequence. Key: (a) Running, (b) 21. SKIPPED on insert."
    },
    {
      "n": 34,
      "type_id": 2,
      "question": "There are 20 boys in class 4J. How many girls are there? [?]",
      "answer0": "22",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Total pupils from the bar graph = 6 + 5 + 9 + 10 + 12 = 42. Girls = 42 − 20 = 22.",
      "hints": ["Add all the bars to get the total number of pupils.", "Subtract the 20 boys from the total."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q34",
      "image_needed": true,
      "image_page": 19,
      "image_loc": "upper half of page, the same 'Favourite Sports' bar graph used for Q33",
      "image_options": false,
      "image_file": "q34.png",
      "notes": "Key: 22. Depends on the Q33 bar graph (total pupils = 42)."
    },
    {
      "n": 35,
      "type_id": 2,
      "question": "Keith and Tom have 975 stickers. Tom has 55 fewer stickers than Keith. How many stickers does Tom have? [?]",
      "answer0": "460",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 3,
      "explanation": "Remove the 55 difference: 975 − 55 = 920, which is 2 equal shares. Tom = 920 ÷ 2 = 460.",
      "hints": ["Subtract 55 to make the two amounts equal.", "Then divide by 2 to find Tom's share."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q35",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 460."
    },
    {
      "n": 36,
      "type_id": 0,
      "question": "Brent spends the same amount of time every day playing his violin. He starts at 4.10 p.m. and stops at 6.05 p.m. (a) How long does Brent play on his violin every day? (b) He continues his practice at 6.30 p.m. for another 1 h 45 min. What time does he finish his practice?",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "(a) From 4.10 p.m. to 6.05 p.m. is 1 h 55 min. (b) 6.30 p.m. + 1 h 45 min = 8.15 p.m.",
      "hints": ["(a) Count on from 4.10 p.m. to 6.05 p.m.", "(b) Add 1 h 45 min to 6.30 p.m."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q36",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "type_id 0: two-part with a duration answer (1 h 55 min) and a time answer (8.15 p.m.) — not a single value/sequence. Key: (a) 1 h 55 min, (b) 8.15 p.m. SKIPPED on insert."
    },
    {
      "n": 37,
      "type_id": 0,
      "question": "Mary wanted to buy a watch for $79.55 and a toy that cost $5.90 more than the watch. (a) How much money would she need to buy the two items? (b) Mary decided to buy 2 watches. She gave the cashier $200. How much change would she get?",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 3,
      "explanation": "(a) Toy = 79.55 + 5.90 = 85.45; total = 85.45 + 79.55 = $165. (b) 2 watches = 79.55 × 2 = 159.10; change = 200 − 159.10 = $40.90.",
      "hints": ["(a) Find the toy price first, then add the watch.", "(b) Find the cost of 2 watches, then subtract from $200."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q37",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "type_id 0: two independent money sub-answers ($165 and $40.90). Key: (a) $165, (b) $40.90. SKIPPED on insert."
    },
    {
      "n": 38,
      "type_id": 0,
      "question": "Kate baked 480 cupcakes over the weekend, she sold 284 cupcakes on Saturday and sold all the remaining cupcakes on Sunday. On Monday, Kate baked another 300 cupcakes and sold all the cupcakes at the end of the day. Each cupcake was sold for $4. (a) How many cupcakes did Kate sell on Sunday and Monday altogether? (b) How much money did Kate collect from selling the cupcakes on Saturday and Monday?",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "(a) Sunday = 480 − 284 = 196; Sunday + Monday = 196 + 300 = 496 cupcakes. (b) Saturday + Monday = 284 + 300 = 584; money = 584 × $4 = $2336.",
      "hints": ["(a) Find Sunday's sales first, then add Monday's 300.", "(b) Add Saturday and Monday cupcakes, then multiply by $4."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q38",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "type_id 0: two sub-answers (496 cupcakes and $2336). Key: (a) 496, (b) $2336. SKIPPED on insert."
    },
    {
      "n": 39,
      "type_id": 0,
      "question": "Some square tiles of the same size are placed around the swimming pool. The side of each tile is 2 m. (a) Find the perimeter of the swimming pool. (b) Find the area of the swimming pool.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 97,
      "difficulty_id": 3,
      "explanation": "The pool is bordered by 2 m tiles: it spans 10 tiles long and 4 tiles wide. Length = 10 × 2 = 20 m, width = 4 × 2 = 8 m. (a) Perimeter = 2 × (20 + 8) = 56 m. (b) Area = 20 × 8 = 160 m².",
      "hints": ["Count the tiles along the length and width of the pool edge.", "(a) Perimeter = 2 × (length + width); (b) Area = length × width."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q39",
      "image_needed": true,
      "image_page": 24,
      "image_loc": "upper-middle of page, a rectangular swimming pool surrounded by a single ring of square tiles, with 2 m tile size marked",
      "image_options": false,
      "image_file": "q39.png",
      "notes": "type_id 0: two sub-answers (perimeter 56 m and area 160 m²). Key: (a) 56 m, (b) 160 m². SKIPPED on insert. Figure required to count tiles."
    },
    {
      "n": 40,
      "type_id": 0,
      "question": "Mrs Tan had a total of 720 chocolates and sweets. She had 3 times as many chocolates as sweets. (a) How many chocolates did Mrs Tan have? (b) Mrs Tan wanted to give each pupil 5 chocolates and 4 sweets. She gave out all her sweets and had some chocolates left. How many chocolates were given out to her pupils?",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "(a) 4 units = 720, 1 unit (sweets) = 180, chocolates = 3 × 180 = 540. (b) Pupils = 180 sweets ÷ 4 = 45 pupils; chocolates given out = 45 × 5 = 225.",
      "hints": ["(a) Total is 4 equal units (3 chocolate + 1 sweet); find one unit first.", "(b) The sweets decide the number of pupils, then multiply by 5 chocolates each."],
      "source": "ACS Primary 2022 P3 Semestral Assessment 2 Q40",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "type_id 0: two sub-answers (540 chocolates and 225 chocolates given out). Key: (a) 540, (b) 225. SKIPPED on insert."
    }
  ]
}