{
  "paper": {
    "school": "Singapore Chinese Girls' School",
    "year": 2022,
    "level": "P3",
    "label": "Semestral Assessment 2",
    "source_prefix": "SCGS 2022 P3 Semestral Assessment 2",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "In 1579 the digit 5 is in the [?] place.",
      "answer0": "ones",
      "answer1": "tens",
      "answer2": "hundreds",
      "answer3": "thousands",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 1579, reading from the right: 9 ones, 7 tens, 5 hundreds, 1 thousand. So the digit 5 is in the hundreds place.",
      "hints": ["Read the digits from the right: ones, tens, hundreds, thousands.", "Count the position of 5 from the right-hand side."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Stem reworded from blank to [?]; answer key option 3 = hundreds."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "Two thousand, one hundred and twelve written in numerals is [?].",
      "answer0": "2012",
      "answer1": "2112",
      "answer2": "2120",
      "answer3": "2121",
      "correct_answer": 1,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Two thousand = 2000, one hundred = 100, twelve = 12. 2000 + 100 + 12 = 2112.",
      "hints": ["Break it into thousands, hundreds, tens and ones.", "Twelve is 12, not 120."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 2 = 2112."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "What is the product of 24 and 8?",
      "answer0": "32",
      "answer1": "162",
      "answer2": "3",
      "answer3": "192",
      "correct_answer": 3,
      "skill_id": 75,
      "difficulty_id": 1,
      "explanation": "Product means multiply. 24 x 8 = 192.",
      "hints": ["'Product' means multiplication.", "24 x 8 = (20 x 8) + (4 x 8) = 160 + 32."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 4 = 192."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "8941 is [?] less than 9041.",
      "answer0": "100",
      "answer1": "190",
      "answer2": "1000",
      "answer3": "1900",
      "correct_answer": 0,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "9041 - 8941 = 100, so 8941 is 100 less than 9041.",
      "hints": ["Find the difference: 9041 - 8941.", "Compare the digits place by place."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 1 = 100."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "Which of the following fraction is not equivalent to 1/2?",
      "answer0": "2/4",
      "answer1": "3/6",
      "answer2": "4/10",
      "answer3": "6/12",
      "correct_answer": 2,
      "skill_id": 77,
      "difficulty_id": 2,
      "explanation": "2/4, 3/6 and 6/12 all simplify to 1/2. 4/10 simplifies to 2/5, which is not 1/2.",
      "hints": ["A fraction equals 1/2 when the numerator is half the denominator.", "Check which option does NOT have numerator = denominator divided by 2."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 3 = 4/10. Question asks for the NOT-equivalent one."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Chloe takes 23 minutes to go home from school. She left school at 11.40 a.m. What time did Chloe get home?",
      "answer0": "11.17 a.m.",
      "answer1": "11.17 p.m.",
      "answer2": "12.03 a.m.",
      "answer3": "12.03 p.m.",
      "correct_answer": 3,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "11.40 a.m. + 20 min = 12.00 noon (12.00 p.m.); + 3 min = 12.03 p.m.",
      "hints": ["Add 23 minutes to 11.40 a.m.", "Crossing 12 noon makes the time p.m., not a.m."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 4 = 12.03 p.m."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "What is the missing number in the number pattern? 1265 , 1280 , 1295 , [?] , 1325",
      "answer0": "1300",
      "answer1": "1310",
      "answer2": "1315",
      "answer3": "1320",
      "correct_answer": 1,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "The numbers increase by 15 each time: 1295 + 15 = 1310. Check: 1310 + 15 = 1325.",
      "hints": ["Find the difference between consecutive numbers.", "1280 - 1265 = 15; add 15 to 1295."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 2 = 1310. Stem 'below' stripped."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "The mass of a durian is 2 kg 250 g. The mass of a pear is 360 g. How much heavier is the mass of the durian than the mass of the pear?",
      "answer0": "1890 g",
      "answer1": "2110 g",
      "answer2": "2610 g",
      "answer3": "5850 g",
      "correct_answer": 1,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "2 kg 250 g = 2250 g. 2250 g - 360 g = 1890 g.",
      "hints": ["Convert 2 kg 250 g to grams first.", "1 kg = 1000 g, so 2 kg 250 g = 2250 g; then subtract 360 g."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 1 = 1890 g."
    },
    {
      "n": 9,
      "type_id": 1,
      "question": "Which angle in the figure is greater than a right angle?",
      "answer0": "angle w",
      "answer1": "angle x",
      "answer2": "angle y",
      "answer3": "angle z",
      "correct_answer": 2,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "Angle y is the obtuse angle in the quadrilateral, the only one larger than a right angle (90 degrees).",
      "hints": ["A right angle is 90 degrees, like the corner of a square.", "Look for the angle that opens wider than a square's corner."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": "q9.png",
      "image_page": 5,
      "image_loc": "top of page, below the question; a quadrilateral with angles labelled w, x, y, z",
      "notes": "Answer key option 3 = angle y. Options are labels referring to the figure; 'below' stripped from stem."
    },
    {
      "n": 10,
      "type_id": 1,
      "question": "Mary took 1 hour 25 minutes to complete his homework. George took 40 minutes faster than Mary to complete his homework. How long did George take to complete his homework?",
      "answer0": "45 min",
      "answer1": "85 min",
      "answer2": "1 h 65 min",
      "answer3": "2 h 05 min",
      "correct_answer": 0,
      "skill_id": 93,
      "difficulty_id": 2,
      "explanation": "1 h 25 min = 85 min. 85 min - 40 min = 45 min.",
      "hints": ["Convert 1 hour 25 minutes to minutes.", "1 h 25 min = 85 min; then subtract 40 min."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 1 = 45 min."
    },
    {
      "n": 11,
      "type_id": 1,
      "question": "Dora had $49.90. Her mother gave her another $15. She spent $18.50. How much money had she left?",
      "answer0": "$31.40",
      "answer1": "$33.50",
      "answer2": "$46.40",
      "answer3": "$64.40",
      "correct_answer": 2,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "$49.90 + $15 = $64.90. $64.90 - $18.50 = $46.40.",
      "hints": ["First add the money her mother gave.", "$49.90 + $15 = $64.90, then subtract $18.50."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 3 = $46.40."
    },
    {
      "n": 12,
      "type_id": 1,
      "question": "A fish tank contains 5 l 70 ml of water. 2190 ml more water is needed to fill up the fish tank. What is the capacity of the fish tank?",
      "answer0": "2760 ml",
      "answer1": "7260 ml",
      "answer2": "7197 ml",
      "answer3": "7890 ml",
      "correct_answer": 1,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "5 l 70 ml = 5070 ml. 5070 ml + 2190 ml = 7260 ml.",
      "hints": ["Convert 5 l 70 ml to millilitres. 1 l = 1000 ml.", "5 l 70 ml = 5070 ml; then add 2190 ml."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 2 = 7260 ml."
    },
    {
      "n": 13,
      "type_id": 1,
      "question": "A pizza was cut into equal pieces. Fred ate 1/2 of it and Joy ate 1/3 of it. What fraction of the pizza was eaten?",
      "answer0": "1/5",
      "answer1": "1/6",
      "answer2": "2/5",
      "answer3": "5/6",
      "correct_answer": 3,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "1/2 + 1/3 = 3/6 + 2/6 = 5/6.",
      "hints": ["Make the denominators the same before adding.", "1/2 = 3/6 and 1/3 = 2/6."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 4 = 5/6."
    },
    {
      "n": 14,
      "type_id": 1,
      "question": "The clock is 15 minutes faster. What is the actual time?",
      "answer0": "1.40 p.m.",
      "answer1": "2.10 p.m.",
      "answer2": "2.40 p.m.",
      "answer3": "3.10 p.m.",
      "correct_answer": 0,
      "skill_id": 88,
      "difficulty_id": 2,
      "explanation": "The clock shows 1.55 (hour hand near 2, minute hand on 11). It is 15 min fast, so actual time = 1.55 - 15 min = 1.40 p.m.",
      "hints": ["First read the time shown on the clock.", "If the clock is fast, subtract 15 minutes to get the actual time."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q14",
      "image_needed": true,
      "image_options": false,
      "image_file": "q14.png",
      "image_page": 6,
      "image_loc": "middle of page, below the question; analogue clock face showing about 1.55",
      "notes": "Answer key option 1 = 1.40 p.m. 'below' stripped from stem."
    },
    {
      "n": 15,
      "type_id": 1,
      "question": "The table shows the price of bus fares for different passengers. Adult $1.20; Senior citizen (above 60 years old) $0.90; Child (below 12 years old) $0.55. Mrs Tan took her two elderly parents out with her 10 year-old son. Her elderly parents were both 65 years old. What was the total bus fare for the four passengers?",
      "answer0": "$1.75",
      "answer1": "$2.35",
      "answer2": "$2.65",
      "answer3": "$3.55",
      "correct_answer": 3,
      "skill_id": 83,
      "difficulty_id": 3,
      "explanation": "Mrs Tan (adult) $1.20 + two senior citizens (65 yrs) 2 x $0.90 = $1.80 + one child (10 yrs) $0.55 = $1.20 + $1.80 + $0.55 = $3.55.",
      "hints": ["Match each of the four people to the correct fare.", "Mrs Tan = adult, two 65-year-old parents = senior citizens, 10-year-old son = child."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key option 4 = $3.55. Table data inlined into the stem ('below' stripped) since it is purely textual."
    },
    {
      "n": 16,
      "type_id": 1,
      "question": "Write 3314 in words.",
      "answer0": "Three thousand, three hundred and forty",
      "answer1": "Three thousand, three hundred and fourteen",
      "answer2": "Three thousand, three hundred and four",
      "answer3": "Thirty-three thousand, one hundred and four",
      "correct_answer": 1,
      "skill_id": 67,
      "difficulty_id": 2,
      "explanation": "3314 = 3 thousands, 3 hundreds, 1 ten, 4 ones = three thousand, three hundred and fourteen.",
      "hints": ["Read it as thousands, hundreds, then the last two digits together.", "14 is read 'fourteen'."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Original is a free-write word answer; converted to MCQ (word answers must be MCQ). Answer key = three thousand, three hundred and fourteen."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "Arrange the following numbers from the greatest to the smallest. 7216, 7261, 7126, 7162 [?], [?], [?], [?]",
      "answer0": "7261",
      "answer1": "7216",
      "answer2": "7162",
      "answer3": "7126",
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 2,
      "explanation": "Compare the tens and ones: 7261 > 7216 > 7162 > 7126.",
      "hints": ["The thousands and hundreds digits are the same; compare the tens digit.", "Greatest first: start with the largest tens value."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task converted to FIB, greatest to smallest. Answer key = 7261, 7216, 7162, 7126."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "What is the quotient when you divide 908 by 5? [?]",
      "answer0": "181",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "908 / 5 = 181 remainder 3. The quotient is 181.",
      "hints": ["'Quotient' is the whole-number result of the division.", "5 x 181 = 905, with 3 left over."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key = 181 (quotient only; remainder 3 not required)."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "3874 people visited Sentosa on Saturday. On Sunday, 1955 fewer people visited it than on Saturday. How many people visited Sentosa on Sunday? [?]",
      "answer0": "1919",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "3874 - 1955 = 1919.",
      "hints": ["'Fewer' means subtract.", "3874 - 1955 = 1919."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q19",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key = 1919."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "Arrange the following fractions from the greatest to the smallest. 5/9, 5/6, 5/7 [?], [?], [?]",
      "answer0": "5/6",
      "answer1": "5/7",
      "answer2": "5/9",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "Same numerator: the smaller the denominator, the larger the fraction. So 5/6 > 5/7 > 5/9.",
      "hints": ["The numerators are all 5; compare the denominators.", "With equal numerators, a smaller denominator means a larger fraction."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q20",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task converted to FIB, greatest to smallest. Answer key = 5/6, 5/7, 5/9."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "Lynn started her computer lesson at 8.30 a.m. It ended at 12.15 p.m. How long was her computer lesson? [?] h [?] min",
      "answer0": "3",
      "answer1": "45",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "8.30 a.m. to 12.30 p.m. is 4 h; 12.15 p.m. is 15 min before 12.30, so 4 h - 15 min = 3 h 45 min. (From 8.30 to 12.15 = 3 h 45 min.)",
      "hints": ["Count whole hours first, then the extra minutes.", "8.30 a.m. to 11.30 a.m. is 3 h; 11.30 to 12.15 is 45 min."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q21",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two blanks (h, min). Answer key = 3 h 45 min."
    },
    {
      "n": 22,
      "type_id": 2,
      "question": "Tara bought 270 pens. She bought three times as many pens as Ray. How many pens did Ray buy? [?]",
      "answer0": "90",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Tara = 3 x Ray, so Ray = 270 / 3 = 90.",
      "hints": ["Tara's amount is 3 times Ray's, so divide to find Ray's.", "270 / 3 = 90."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q22",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key = 90."
    },
    {
      "n": 23,
      "type_id": 2,
      "question": "How many more squares must be shaded in the figure so that 4/5 of the figure is shaded? [?]",
      "answer0": "5",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 77,
      "difficulty_id": 3,
      "explanation": "The figure has 15 squares. 4/5 of 15 = 12 squares shaded. Currently 7 are shaded, so 12 - 7 = 5 more must be shaded.",
      "hints": ["First find how many squares make up the whole figure, then 4/5 of that.", "Count squares already shaded and subtract from the target."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q23",
      "image_needed": true,
      "image_options": false,
      "image_file": "q23.png",
      "image_page": 11,
      "image_loc": "middle of page, below the question; a 5-by-3 grid of squares with some shaded",
      "notes": "Answer key = 5. Figure is a 15-square (5x3) grid with 7 shaded; 'below' stripped. Count to verify shaded squares from the crop."
    },
    {
      "n": 24,
      "type_id": 2,
      "question": "How much more water is needed to fill the following beaker to 1000 ml? [?] ml",
      "answer0": "200",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 84,
      "difficulty_id": 2,
      "explanation": "The beaker holds 800 ml of water; 1000 ml - 800 ml = 200 ml more needed.",
      "hints": ["Read the water level marked on the beaker.", "Subtract the current amount from 1000 ml."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q24",
      "image_needed": true,
      "image_options": false,
      "image_file": "q24.png",
      "image_page": 11,
      "image_loc": "lower-left of page, below the question; a beaker marked 1000 ml at top with water filled to about 800 ml",
      "notes": "Answer key = 200 ml, implying the beaker is filled to 800 ml. Answer unit 'ml' is fixed by the printed blank."
    },
    {
      "n": 25,
      "type_id": 2,
      "question": "The scale shows the mass of 4 apples. What is the mass of 8 such apples? [?] g",
      "answer0": "680",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "4 apples = 340 g (scale reading), so 8 apples = 340 g x 2 = 680 g.",
      "hints": ["Read the mass of 4 apples from the scale.", "8 apples is double 4 apples, so double the mass."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q25",
      "image_needed": true,
      "image_options": false,
      "image_file": "q25.png",
      "image_page": 12,
      "image_loc": "top-middle of page, below the question; a weighing scale (dial 0-500 g) holding 4 apples, needle near 340 g",
      "notes": "Answer key = 680 g, so the scale shows 340 g for 4 apples. Answer unit 'g' is fixed by the printed blank."
    },
    {
      "n": 26,
      "type_id": 2,
      "question": "Meili was left with 90 cents after paying for 2 bars of chocolates and 1 bag of chips. The 2 chocolate bars cost $3.30 and the bag of chips costs $2.00. How much money did she have at first? [?]",
      "answer0": "$6.20",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Spent = $3.30 + $2.00 = $5.30. At first = $5.30 + $0.90 = $6.20.",
      "hints": ["Add up everything she spent, then add what she had left.", "$3.30 + $2.00 + $0.90 = $6.20."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q26",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Prices ('2 for $3.30' chocolate, '$2.00' chips) were shown only in the picture; inlined into the stem as text so no figure is required. Answer key = $6.20. Printed answer blank prefixed '$'."
    },
    {
      "n": 27,
      "type_id": 1,
      "question": "Name the pair of parallel lines.",
      "answer0": "AB // CD",
      "answer1": "AE // CB",
      "answer2": "AB // CB",
      "answer3": "AE // CD",
      "correct_answer": 0,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "On the grid, line AB and line CD run in the same direction and never meet, so AB // CD.",
      "hints": ["Parallel lines run in the same direction and never cross.", "Look for two line segments with the same slant on the grid."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q27",
      "image_needed": true,
      "image_options": false,
      "image_file": "q27.png",
      "image_page": 13,
      "image_loc": "top of page, below the question; a square grid with two zig-zag/peak lines, vertices labelled A, C, E, F, B, D",
      "notes": "Original is a free-write answer ('Ans: ___ // ___'); converted to MCQ. Answer key = AB // CD. Distractors built from the other labelled points."
    },
    {
      "n": 28,
      "type_id": 0,
      "question": "Use a ruler and a set square to draw a line which is perpendicular to AB, and passing through Point W.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "Draw a line through W that meets AB at 90 degrees (perpendicular). AB runs diagonally on the grid; the answer line crosses it at a right angle.",
      "hints": [],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q28",
      "image_needed": true,
      "image_options": false,
      "image_file": "q28.png",
      "image_page": 13,
      "image_loc": "lower-middle of page, below the question; a square grid with a diagonal line AB and point W marked near the top-left",
      "notes": "Interactive draw task (no app question type) -> type_id 0, will be skipped on insert. Answer: a line through W perpendicular to the diagonal AB."
    },
    {
      "n": 29,
      "type_id": 2,
      "question": "The picture graph shows the number of medals won by some countries. What is the total number of medals won by Korea and Thailand? [?]",
      "answer0": "64",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "From the graph, Korea won 40 medals and Thailand won 24 medals. 40 + 24 = 64.",
      "hints": ["Read the bar lengths for Korea and Thailand off the scale.", "Add the two amounts together."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q29",
      "image_needed": true,
      "image_options": false,
      "image_file": "q29.png",
      "image_page": 14,
      "image_loc": "top of page, above questions 29 and 30; horizontal bar/picture graph 'Number of Medals Won' for Singapore, Japan, Thailand, Korea, China (scale 0-45)",
      "notes": "Answer key = 64, so Korea 40 + Thailand 24. Shared graph used by Q29 and Q30. 'below' stripped from stem."
    },
    {
      "n": 30,
      "type_id": 1,
      "question": "The picture graph shows the number of medals won by some countries. Which country won twice as many medals as Singapore?",
      "answer0": "Japan",
      "answer1": "Thailand",
      "answer2": "Korea",
      "answer3": "China",
      "correct_answer": 0,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Singapore won 16 medals. Twice 16 = 32, which is Japan's total.",
      "hints": ["Read Singapore's total first, then double it.", "Find the country whose bar reaches that doubled value."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q30",
      "image_needed": true,
      "image_options": false,
      "image_file": "q30.png",
      "image_page": 14,
      "image_loc": "top of page, above questions 29 and 30; horizontal bar/picture graph 'Number of Medals Won' for Singapore, Japan, Thailand, Korea, China (scale 0-45)",
      "notes": "Original is a free-write country answer; converted to MCQ. Answer key = Japan (Singapore 16, Japan 32). Same graph as Q29."
    },
    {
      "n": 31,
      "type_id": 2,
      "question": "A total of 380 movie tickets were sold in two days. 90 fewer tickets were sold on the first day than on the second day. How many tickets were sold on the first day? [?]",
      "answer0": "145",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 3,
      "explanation": "Remove the 90 difference: 380 - 90 = 290; this is two equal first-day amounts, so first day = 290 / 2 = 145.",
      "hints": ["Subtract the 90-ticket difference from the total first.", "(380 - 90) / 2 gives the smaller (first-day) amount."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q31",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key working: 380 - 90 = 290; 290 / 2 = 145."
    },
    {
      "n": 32,
      "type_id": 2,
      "question": "Mrs Tan bought 500 g of flour. She used 12 g of flour for each cupcake. If she baked 9 cupcakes in all, how much flour had she left? [?] g",
      "answer0": "392",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Flour used = 12 g x 9 = 108 g. Left = 500 g - 108 g = 392 g.",
      "hints": ["First find the total flour used for 9 cupcakes.", "12 g x 9 = 108 g; then subtract from 500 g."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q32",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key working: 12 x 9 = 108; 500 - 108 = 392 g."
    },
    {
      "n": 33,
      "type_id": 2,
      "question": "Huni bought 3 cookies for $5.00 and received 1 cookie for free. How much did she pay for 12 cookies? [?]",
      "answer0": "$15.00",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "For every 3 paid + 1 free = 4 cookies. 12 cookies = 12 / 4 = 3 groups, so she paid for 3 x 3 = 9 cookies = 3 x $5.00 = $15.00.",
      "hints": ["Each '3 bought + 1 free' gives 4 cookies for $5.00.", "12 cookies = 3 such groups; cost = 3 x $5.00."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q33",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key working: free cookies 12 - 3 = 9; 9 / 3 = 3; paid $5.00 x 3 = $15.00. Decorative cookie picture only (no data) - not needed."
    },
    {
      "n": 34,
      "type_id": 2,
      "question": "A shopkeeper had some oranges. She threw away 13 rotten oranges. She packed the remaining 216 oranges equally into 8 boxes. a) How many oranges did the shopkeeper have at first? b) How many oranges were there in each box? [?] [?]",
      "answer0": "229",
      "answer1": "27",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "a) At first = 216 + 13 = 229 oranges. b) Each box = 216 / 8 = 27 oranges.",
      "hints": ["a) Add back the rotten oranges that were thrown away.", "b) Divide the remaining 216 oranges among 8 boxes."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q34",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two-part question; blanks in order a then b. Answer key: a) 216 + 13 = 229; b) 216 / 8 = 27."
    },
    {
      "n": 35,
      "type_id": 2,
      "question": "Lily went shopping and bought a dress, a bag and a watch. She paid $605 for a dress and a bag. The bag cost 4 times as much as the dress. The watch cost $19 more than the bag. (a) How much did Lily pay for the bag? (b) How much did she pay for the watch? [?] [?]",
      "answer0": "$484",
      "answer1": "$503",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Dress + bag = 5 units = $605, so 1 unit (dress) = $605 / 5 = $121. a) Bag = 4 units = $121 x 4 = $484. b) Watch = $484 + $19 = $503.",
      "hints": ["Dress is 1 unit and bag is 4 units, so together they are 5 units = $605.", "Find 1 unit, then bag = 4 units; watch = bag + $19."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q35",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two-part question; blanks in order a then b. Decorative dress/bag/watch picture only (no data) - not needed. Answer key: 605 / 5 = 121; bag 121 x 4 = $484; watch 484 + 19 = $503."
    },
    {
      "n": 36,
      "type_id": 2,
      "question": "Carol had a square plot of land. She planted 7 trees on each side. A tree was planted at each corner. How many trees were there in total? [?]",
      "answer0": "24",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "4 sides x 7 = 28 counts, but the 4 corner trees are each counted twice, so 28 - 4 = 24. (Answer key: 5 x 4 = 20 non-corner-overlap, + 4 corners = 24.)",
      "hints": ["The corner trees are shared between two sides, so do not count them twice.", "Count trees per side carefully, accounting for the 4 corners."],
      "source": "SCGS 2022 P3 Semestral Assessment 2 Q36",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Decorative square-plot picture only (no data) - not needed. Answer key working: 5 x 4 = 20; 20 + 4 = 24. Total = 24 trees."
    }
  ]
}