{
  "paper": {
    "school": "CHIJ St Nicholas Girls' School",
    "year": 2024,
    "level": "P3",
    "label": "End of Year Exam",
    "source_prefix": "St Nicholas 2024 P3 End of Year Exam",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "What is four thousand, one hundred and sixty-two in numbers?",
      "answer0": "4621",
      "answer1": "4216",
      "answer2": "4162",
      "answer3": "4062",
      "correct_answer": 2,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Four thousand = 4000, one hundred = 100, sixty-two = 62. 4000 + 100 + 62 = 4162.",
      "hints": ["Break the words into thousands, hundreds, tens and ones.", "4000 + 100 + 60 + 2."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option (3) = 4162."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "What is the product of 304 and 8?",
      "answer0": "38",
      "answer1": "2432",
      "answer2": "2512",
      "answer3": "2532",
      "correct_answer": 1,
      "skill_id": 75,
      "difficulty_id": 1,
      "explanation": "304 x 8 = 2432.",
      "hints": ["Product means multiply.", "304 x 8 = (300 x 8) + (4 x 8) = 2400 + 32."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option (2) = 2432."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which lines are perpendicular to each other?",
      "answer0": "AB and AD",
      "answer1": "AB and CD",
      "answer2": "AD and BC",
      "answer3": "AD and DC",
      "correct_answer": 0,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "AB is vertical and AD is horizontal, meeting at A at a right angle, so AB and AD are perpendicular.",
      "hints": ["Perpendicular lines meet at a right angle (90 degrees).", "Look for the corner where two lines form an L."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q3",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "top of page, square grid with points A, D (top) and B, C (bottom) and a slanted line from D to C",
      "image_options": false,
      "image_file": "q3.png",
      "notes": "Key: option (1) = AB and AD."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "What is the area of the figure?",
      "answer0": "16 square units",
      "answer1": "14 square units",
      "answer2": "12 square units",
      "answer3": "10 square units",
      "correct_answer": 2,
      "skill_id": 95,
      "difficulty_id": 2,
      "explanation": "Counting the shaded squares (whole squares plus pairs of half/triangle squares that combine to whole units) gives 12 square units.",
      "hints": ["1 unit by 1 unit is one square unit.", "Count whole shaded squares, then combine half-shaded triangles into wholes."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q4",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "middle-lower of page, shaded figure on a square grid with 1 unit by 1 unit scale shown",
      "image_options": false,
      "image_file": "q4.png",
      "notes": "Key: option (3) = 12 square units. Count-to-verify shaded area against crop."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "2/3 + 1/6 = [?]",
      "answer0": "2/6",
      "answer1": "3/6",
      "answer2": "3/9",
      "answer3": "5/6",
      "correct_answer": 3,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "2/3 = 4/6. 4/6 + 1/6 = 5/6.",
      "hints": ["Make the denominators the same first.", "2/3 is the same as 4/6."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option (4) = 5/6. Boxed '?' in the printed equation."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Mdm Sari left her house at 06 55. She took 1 h 15 min to reach her office. What time did Mdm Sari reach her office?",
      "answer0": "08 00",
      "answer1": "08 10",
      "answer2": "08 30",
      "answer3": "05 40",
      "correct_answer": 1,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "06 55 + 1 h = 07 55. 07 55 + 15 min = 08 10.",
      "hints": ["Add the hour first, then the minutes.", "06 55 + 5 min = 07 00, then add the rest."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option (2) = 08 10."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "Paul bought 3 packets of sweets. James bought twice as many packets of sweets as Paul. There were 27 sweets in each packet. How many sweets did James buy?",
      "answer0": "243",
      "answer1": "162",
      "answer2": "81",
      "answer3": "54",
      "correct_answer": 1,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "James bought 3 x 2 = 6 packets. 6 x 27 = 162 sweets.",
      "hints": ["First find how many packets James bought.", "James packets = 3 x 2 = 6, then multiply by 27."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option (2) = 162."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Arrange the following numbers in increasing order.\n7140 , 7014 , 7104",
      "answer0": "7014",
      "answer1": "7104",
      "answer2": "7140",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 1,
      "explanation": "Compare digit by digit: 7014 < 7104 < 7140.",
      "hints": ["Compare the hundreds and tens digits.", "Smallest first, greatest last."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task converted to FIB; answers in order smallest to greatest. Key: 7014, 7104, 7140."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "The bar graph shows the number of fruits sold at a fruit stall. What is the total number of fruits sold? [?]",
      "answer0": "26",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Apples 10 + Bananas 8 + Oranges 3 + Pears 5 = 26.",
      "hints": ["Read each bar's height.", "Add all four fruit totals."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q9",
      "image_needed": true,
      "image_page": 6,
      "image_loc": "middle of page, vertical bar graph titled 'Fruits sold at a fruit stall' with Apples, Bananas, Oranges, Pears",
      "image_options": false,
      "image_file": "q9.png",
      "notes": "Key: 26."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "What is 3/4 - 5/8 ? [?]",
      "answer0": "1/8",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "3/4 = 6/8. 6/8 - 5/8 = 1/8.",
      "hints": ["Convert 3/4 to eighths.", "3/4 = 6/8."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1/8."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Lando bought a toy. He gave the cashier $10 and received a change of $3.75. How much did the toy cost? $[?]",
      "answer0": "6.25",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "$10.00 - $3.75 = $6.25.",
      "hints": ["Cost = amount given minus change.", "$10.00 - $3.75."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 6.25."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "A pencil case costs $8. A book costs $13 more than the pencil case. Caesar bought 2 such books and one such pencil case. How much money did Caesar spend altogether? $[?]",
      "answer0": "50.00",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Book = $8 + $13 = $21. 2 books = $42. Total = $42 + $8 = $50.00.",
      "hints": ["First find the cost of one book.", "Book = $8 + $13 = $21."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 50.00."
    },
    {
      "n": 13,
      "type_id": 0,
      "question": "Draw a line parallel to the given line in the grid. Use arrowheads to show that the lines are parallel.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "Draw any line on the grid going the same direction as MN (across 4 units, up 1 unit) and add arrowheads on both lines.",
      "hints": [],
      "source": "St Nicholas 2024 P3 End of Year Exam Q13",
      "image_needed": true,
      "image_page": 8,
      "image_loc": "top of page, square grid with a given line from M to N sloping up to the right, 1 unit scale shown",
      "image_options": false,
      "image_file": "q13.png",
      "notes": "Interactive draw task (draw a parallel line on grid) - no value answer. type_id 0, SKIPPED on insert. Key shows a parallel line drawn on the grid."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "The figure shows the amount of water in a measuring cup. What is the total amount of water in 6 such measuring cups? [?] ml",
      "answer0": "1560",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "The cup shows 260 ml. 260 x 6 = 1560 ml.",
      "hints": ["Read the water level on the scale first.", "Each cup holds 260 ml; multiply by 6."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q14",
      "image_needed": true,
      "image_page": 8,
      "image_loc": "middle-left of page, measuring cup with scale marked 100 ml, 200 ml, 300 ml and water shaded to between 200 and 300",
      "image_options": false,
      "image_file": "q14.png",
      "notes": "Key: 1560. Implies one cup = 260 ml (1560 / 6). Verify water level on crop."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "A soccer match started at 23 30 and ended at 01 08 the next day. What was the duration of the soccer match? [?] h [?] min",
      "answer0": "1",
      "answer1": "38",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "23 30 to 00 30 is 1 h. 00 30 to 01 08 is 38 min. Total 1 h 38 min.",
      "hints": ["Count from 23 30 to midnight first.", "23 30 to 24 00 is 30 min, then add to 01 08."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two blanks: hours then minutes. Key: 1 h 38 min."
    },
    {
      "n": 16,
      "type_id": 1,
      "question": "The bar graph shows the number of books read by four pupils in a month. Mira read 3 fewer books than [?].",
      "answer0": "Nora",
      "answer1": "Kumar",
      "answer2": "De Ming",
      "answer3": "Mira",
      "correct_answer": 1,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Mira read 12 books. 3 more than 12 is 15, which is Kumar. (Part (a): Nora read the most with 18.)",
      "hints": ["Read Mira's bar, then add 3.", "Find the pupil whose bar is 3 longer than Mira's."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q16",
      "image_needed": true,
      "image_page": 9,
      "image_loc": "top-middle of page, horizontal bar graph titled 'Books read by four pupils' with Mira, Kumar, Nora, De Ming on a 0-24 scale",
      "image_options": false,
      "image_file": "q16.png",
      "notes": "Original is two parts: (a) Who read the most? -> Nora; (b) Mira read 3 fewer books than ___ -> Kumar. Modelled here as MCQ on part (b) word answer; key: a) Nora, b) Kumar."
    },
    {
      "n": 17,
      "type_id": 1,
      "question": "Fill in the blank with '>', '<' or '='.\n4/10 [?] 2/5",
      "answer0": ">",
      "answer1": "<",
      "answer2": "=",
      "answer3": "cannot be determined",
      "correct_answer": 2,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "2/5 = 4/10, so 4/10 = 2/5.",
      "hints": ["Convert 2/5 to tenths.", "2/5 = 4/10."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (a) of Q17. Symbol-choice converted to MCQ (4 opts). Key: a) =."
    },
    {
      "n": 18,
      "type_id": 1,
      "question": "Fill in the blank with '>', '<' or '='.\n4/9 [?] 7/10",
      "answer0": ">",
      "answer1": "<",
      "answer2": "=",
      "answer3": "cannot be determined",
      "correct_answer": 1,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "4/9 is less than 1/2, while 7/10 is more than 1/2, so 4/9 < 7/10.",
      "hints": ["Compare each fraction to one half.", "4/9 < 1/2 < 7/10."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (b) of printed Q17 (symbol comparison). Modelled as separate MCQ item; key: b) <. Printed source question number is Q17."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "Mindy gave away some food items to some families. Each family received 5 cans of mushrooms and 7 packets of seaweed. Mindy gave away 35 cans of mushrooms altogether. How many packets of seaweed did she give away altogether? [?]",
      "answer0": "49",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Number of families = 35 / 5 = 7. Seaweed = 7 x 7 = 49 packets.",
      "hints": ["First find the number of families from the mushroom cans.", "35 / 5 = 7 families, then multiply by 7 packets."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q18",
      "image_needed": true,
      "image_page": 10,
      "image_loc": "middle of page, drawings of 5 mushroom cans and 7 seaweed packets",
      "image_options": false,
      "image_file": "q18.png",
      "notes": "Printed as Q18. Key (labelled Q18): 49. Image is illustrative only; values are stated in the text."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "There are 24 cars and motorcycles altogether. There is a total number of 76 wheels. Each car has 4 wheels and each motorcycle has 2 wheels. How many cars are there? [?]",
      "answer0": "14",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "If all 24 were motorcycles: 24 x 2 = 48 wheels. Extra wheels = 76 - 48 = 28. Each car adds 2 extra wheels, so cars = 28 / 2 = 14.",
      "hints": ["Suppose all 24 vehicles were motorcycles first.", "Each car has 2 more wheels than a motorcycle."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q19",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as Q19. Key (labelled Q19): 14 cars."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "Mr Hoh had 972 satay sticks. He packed the satay sticks equally into 9 containers. How many satay sticks were there in 7 such containers? [?]",
      "answer0": "756",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "972 / 9 = 108 sticks per container. 108 x 7 = 756.",
      "hints": ["Find how many sticks are in one container first.", "972 / 9 = 108, then multiply by 7."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q20",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as Q20. Key (labelled Q20): 972/9=108, 108x7=756."
    },
    {
      "n": 22,
      "type_id": 2,
      "question": "Lionel wanted to run 1 km 50 m. He completed 2 rounds on a running track. Each round is 400 m. How much further did he have to run? [?] m",
      "answer0": "250",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "1 km 50 m = 1050 m. 2 rounds = 400 x 2 = 800 m. 1050 - 800 = 250 m.",
      "hints": ["Convert 1 km 50 m to metres first.", "1 km 50 m = 1050 m."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q21",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as Q21. Key (labelled Q21): 1050-800=250."
    },
    {
      "n": 23,
      "type_id": 2,
      "question": "Mrs Afiya cut a long string into 4 equal parts. She then used each part to form a rectangular frame. The length of the frame was 29 cm and its breadth was 17 cm.\n(a) What was the perimeter of each rectangular frame? [?] cm\n(b) How long was the string? [?] cm",
      "answer0": "92",
      "answer1": "368",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 96,
      "difficulty_id": 2,
      "explanation": "(a) Perimeter = 2 x (29 + 17) = 2 x 46 = 92 cm. (b) String = 4 x 92 = 368 cm.",
      "hints": ["Perimeter of a rectangle = 2 x (length + breadth).", "The string equals 4 frames since it was cut into 4 equal parts."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q22",
      "image_needed": true,
      "image_page": 14,
      "image_loc": "upper part of page, rectangle labelled 29 cm (length) and 17 cm (breadth)",
      "image_options": false,
      "image_file": "q22.png",
      "notes": "Two blanks: (a) perimeter then (b) string length. Key: a) 58+34=92, b) 92x4=368."
    },
    {
      "n": 24,
      "type_id": 2,
      "question": "The figures are made up of identical squares. The figures follow a pattern.\nFigure: 1, 2, 3, ..., 6 ; Number of shaded squares: 8, 12, 16, ..., ?\n(a) How many shaded squares are there in Figure 6? [?]\n(b) A figure has a total of 52 shaded squares. What is the figure number? [?]",
      "answer0": "28",
      "answer1": "12",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 3,
      "explanation": "Pattern adds 4 each figure: shaded = 4 x figure + 4. (a) Figure 6 = 4 x 6 + 4 = 28. (b) 52 = 4 x n + 4, so n = 12.",
      "hints": ["The number of shaded squares increases by 4 each time.", "Shaded = 4 x figure number + 4."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q23",
      "image_needed": true,
      "image_page": 15,
      "image_loc": "top of page, three figures (Figure 1, 2, 3) made of shaded squares with white centres, plus a table of values",
      "image_options": false,
      "image_file": "q23.png",
      "notes": "Two blanks: (a) Figure 6 count then (b) figure number. Key: a) 28, b) 12."
    },
    {
      "n": 25,
      "type_id": 2,
      "question": "Ryan had some marbles. Ben had four times as many marbles as Ryan. Doris had 36 marbles more than Ben. The three children had 270 marbles altogether.\n(a) How many marbles did Ryan have? [?]\n(b) Ryan and Ben decided to share their marbles equally. How many marbles did Ben give Ryan? [?]",
      "answer0": "26",
      "answer1": "39",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "(a) Ryan + Ben + Doris = 270. 270 - 36 = 234 = 9 units (Ryan 1 + Ben 4 + Doris 4). 234 / 9 = 26 = Ryan. (b) Ben = 26 x 4 = 104; Ryan = 26. Total 130, each gets 65. Ben gives 104 - 65 = 39.",
      "hints": ["Subtract the extra 36 first so the parts are in clean units.", "After removing 36, the total is 9 equal units."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q24",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as Q24. Key (labelled Q24): a) 270-36=234, 234/9=26; b) 26x3=78, 78/2=39."
    },
    {
      "n": 26,
      "type_id": 2,
      "question": "At first, there were some adults and 500 children at the stadium. After another 612 adults and 300 children arrived, there were 3 times as many adults as children in the end.\n(a) How many children were there in the end? [?]\n(b) How many adults were there at first? [?]",
      "answer0": "800",
      "answer1": "1788",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "(a) Children in end = 500 + 300 = 800. (b) Adults in end = 3 x 800 = 2400. Adults at first = 2400 - 612 = 1788.",
      "hints": ["Find the number of children in the end first.", "Adults in the end = 3 x children in the end."],
      "source": "St Nicholas 2024 P3 End of Year Exam Q25",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as Q25. Key (labelled Q25): a) 500+300=800, b) 800x3=2400, 2400-612=1788."
    }
  ]
}