{
  "paper": {
    "school": "Tao Nan",
    "year": 2022,
    "level": "P3",
    "label": "Semestral Assessment 2",
    "source_prefix": "Tao Nan 2022 P3 Semestral Assessment 2",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "The value of the digit 9 in 5920 is [?].",
      "answer0": "9",
      "answer1": "90",
      "answer2": "900",
      "answer3": "9000",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "9 is in the hundreds place, so its value is 9 x 100 = 900.",
      "hints": ["Look at which place the digit 9 sits in.", "5920: 9 is in the hundreds column."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q1=3 (option 3 = 900)."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "What is the difference between 9733 and 250 ?",
      "answer0": "9483",
      "answer1": "9523",
      "answer2": "9583",
      "answer3": "9983",
      "correct_answer": 0,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "9733 - 250 = 9483.",
      "hints": ["Difference means subtract.", "9733 - 250."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q2=1 (option 1 = 9483)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which of the following does not have the same value as 1/2 ?",
      "answer0": "2/6",
      "answer1": "4/8",
      "answer2": "5/10",
      "answer3": "6/12",
      "correct_answer": 0,
      "skill_id": 77,
      "difficulty_id": 2,
      "explanation": "4/8, 5/10, 6/12 all simplify to 1/2. 2/6 simplifies to 1/3, so it is the odd one out.",
      "hints": ["Simplify each fraction.", "2/6 = 1/3, not 1/2."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q3=1 (option 1 = 2/6)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which of the following fractions is the greatest?",
      "answer0": "2/3",
      "answer1": "3/4",
      "answer2": "5/6",
      "answer3": "7/12",
      "correct_answer": 2,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "Over a common denominator of 12: 2/3=8/12, 3/4=9/12, 5/6=10/12, 7/12. 5/6 is the greatest.",
      "hints": ["Convert all to twelfths.", "Compare the numerators."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q4=3 (option 3 = 5/6)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "The time now is 3.20 p.m. What time was it 25 minutes ago?",
      "answer0": "2.20 p.m.",
      "answer1": "2.55 p.m.",
      "answer2": "3.25 p.m.",
      "answer3": "3.45 p.m.",
      "correct_answer": 1,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "3.20 - 25 min = 2.55 p.m.",
      "hints": ["Subtract 25 minutes from 3.20.", "20 min back is 3.00; another 5 min back is 2.55."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q5=2 (option 2 = 2.55 p.m.). Clock face image showing 3.20 on page 4, centred below the question. image_page 4."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Study the lines carefully. Which line is parallel to XY?",
      "answer0": "PQ",
      "answer1": "RS",
      "answer2": "UT",
      "answer3": "VW",
      "correct_answer": 3,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Line VW runs in the same direction as XY without crossing it, so VW is parallel to XY.",
      "hints": ["Parallel lines never meet and run the same way.", "Compare each line's slant to XY."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q6",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q6=4 (option 4 = VW). Diagram of intersecting labelled lines on page 5, below the question. image_page 5."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "What is the mass of the bag of rice?",
      "answer0": "230 g",
      "answer1": "260 g",
      "answer2": "2300 g",
      "answer3": "2600 g",
      "correct_answer": 3,
      "skill_id": 84,
      "difficulty_id": 2,
      "explanation": "The pointer on the kg scale reads 2.6 kg, which is 2600 g.",
      "hints": ["Read the needle position on the kg dial.", "2.6 kg = 2600 g."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q7",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q7=4 (option 4 = 2600 g). Weighing-scale dial with bag of rice on page 5, below the question. image_page 5."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "The figure is made up of a rectangle and a triangle. Find the perimeter of the figure.",
      "answer0": "34 cm",
      "answer1": "43 cm",
      "answer2": "50 cm",
      "answer3": "57 cm",
      "correct_answer": 1,
      "skill_id": 96,
      "difficulty_id": 2,
      "explanation": "Perimeter = 10 (top) + 8 + 8 (triangle sides) + 10 (bottom) + 7 (left) = 43 cm. The internal 7 cm dashed line is not part of the perimeter.",
      "hints": ["Add only the outer edges.", "10 + 8 + 8 + 10 + 7 = 43."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q8=2 (option 2 = 43 cm). Composite rectangle+triangle figure with labelled sides on page 6, below the question. image_page 6."
    },
    {
      "n": 9,
      "type_id": 1,
      "question": "The figure is made up of 7 identical squares. Find the area of the figure.",
      "answer0": "175 cm2",
      "answer1": "140 cm2",
      "answer2": "25 cm2",
      "answer3": "80 cm2",
      "correct_answer": 0,
      "skill_id": 97,
      "difficulty_id": 2,
      "explanation": "Each square is 5 cm by 5 cm = 25 cm2. Area = 7 x 25 = 175 cm2.",
      "hints": ["Find the area of one square first.", "5 x 5 = 25, then x 7."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q9=1 (option 1 = 175 cm2). L-shaped arrangement of 7 squares, side 5 cm labelled, on page 6, below the question. image_page 6."
    },
    {
      "n": 10,
      "type_id": 1,
      "question": "The graph shows the number of watermelons a fruit seller sold at a funfair. Fruit Sellers B, C and D sold [?] watermelons altogether.",
      "answer0": "56",
      "answer1": "48",
      "answer2": "14",
      "answer3": "12",
      "correct_answer": 0,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Each picture = 4 watermelons. B=3, C=4, D=5 pictures = 12 pictures. 12 x 4 = 56.",
      "hints": ["Count the picture symbols for B, C and D.", "Each symbol stands for 4 watermelons."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q10=2 (option 2 = 56). Picture graph with watermelon symbols for sellers A-D; key = 4 watermelons each, on page 7, below the question. image_page 7."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "What is the missing number in the box?\n2 8 5 2\n+ 6 0 [?] 1\n= 8 9 2 3",
      "answer0": "7",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "8923 - 2852 = 6071, so the missing tens digit in 60[?]1 is 7.",
      "hints": ["Subtract 2852 from 8923.", "6071 means the boxed digit is 7."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q11=7. Vertical addition; only the boxed tens digit is unknown."
    },
    {
      "n": 12,
      "type_id": 1,
      "question": "Mr Wong bought two shirts. He gave the cashier $140 and received $3.40 as change. Which two shirts did he buy?",
      "answer0": "Shirt A ($64.25) and Shirt B ($66.90)",
      "answer1": "Shirt A ($64.25) and Shirt C ($72.35)",
      "answer2": "Shirt B ($66.90) and Shirt C ($72.35)",
      "answer3": "All three shirts",
      "correct_answer": 1,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Amount spent = 140 - 3.40 = 136.60. Shirt A + Shirt C = 64.25 + 72.35 = 136.60, so he bought A and C.",
      "hints": ["Work out how much was spent: 140 - 3.40.", "Find the two shirt prices that add to 136.60."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q12",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q12 = shirts A and C. Word-answer (which shirts) converted to MCQ. Shirt pictures with price tags A $64.25, B $66.90, C $72.35 on page 8, below the question. image_page 8."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Mark wants to shade 3/4 of the figure. How many more squares must be shaded?",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 77,
      "difficulty_id": 2,
      "explanation": "The figure has 12 squares; 3/4 of 12 = 9 must be shaded. 3 are already shaded, so 9 - 3 = 6 more.",
      "hints": ["3/4 of 12 squares = 9 squares.", "Subtract the squares already shaded."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q13",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q13=6. 3x4 grid of 12 squares with 3 squares already shaded, on page 9, below the question. image_page 9."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Edwin studied from 3.10 p.m. to 4.55 p.m. How long did he study?\n[?] h [?] min",
      "answer0": "1",
      "answer1": "45",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "From 3.10 to 4.10 is 1 h; 4.10 to 4.55 is 45 min. Total 1 h 45 min.",
      "hints": ["Count whole hours first, then the extra minutes.", "3.10 to 4.55 = 1 h 45 min."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q14 = 1 h 45 min. Answer box has 'h' and 'min' labels (two blanks)."
    },
    {
      "n": 15,
      "type_id": 1,
      "question": "Is the angle greater or smaller than a right angle?",
      "answer0": "greater than a right angle",
      "answer1": "smaller than a right angle",
      "answer2": "equal to a right angle",
      "answer3": "twice a right angle",
      "correct_answer": 0,
      "skill_id": 99,
      "difficulty_id": 1,
      "explanation": "The angle shown opens wider than 90 degrees, so it is greater than a right angle.",
      "hints": ["Compare the opening to a square corner (90 degrees).", "Wider than a corner means greater."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q15",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q15 = greater than a right angle. Word-answer converted to MCQ. Single drawn angle on page 9, below the question. image_page 9."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "4/5 - 3/10 = [?]\nExpress your answer in the simplest form.",
      "answer0": "1/2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "4/5 = 8/10. 8/10 - 3/10 = 5/10 = 1/2.",
      "hints": ["Make a common denominator of 10.", "8/10 - 3/10 = 5/10, then simplify."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q16 = 1/2."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "4 similar cylinders are placed on the balance scale. What is the mass of one cylinder?\n[?] g",
      "answer0": "180",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "4 cylinders balance 720 g, so one cylinder = 720 / 4 = 180 g.",
      "hints": ["The two sides balance, so total mass is equal.", "720 / 4 = 180."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q17",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q17 = 180 g. Balance scale: 4 cylinders on left, 720 g weight on right, on page 10, below the question. Answer box labelled 'g'. image_page 10."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "How many faces does a cube have?\n[?] faces",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 98,
      "difficulty_id": 1,
      "explanation": "A cube has 6 faces.",
      "hints": ["Think of a dice.", "Top, bottom, and four sides."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q18 = 6 faces. Cube illustration present but not required to answer. Answer box labelled 'faces'."
    },
    {
      "n": 19,
      "type_id": 0,
      "question": "Fandi, Sundram and David ran a total of 20 rounds around a running track. Sundram ran the greatest number of rounds. Complete the picture graph by filling in the names, Sundram and Fandi.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Each foot = 2 rounds. David's column has 1 foot = 2 rounds. The tallest column (7 feet = 14 rounds) is labelled Sundram; the remaining column (2 feet = 4 rounds) is labelled Fandi. 14 + 4 + 2 = 20.",
      "hints": ["Each footprint stands for 2 rounds.", "Sundram ran the most, so label the tallest column."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q19",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Interactive: label/complete the picture graph (fill in two names under columns) - no single value answer, so type_id 0, skipped on insert. Answer: tallest column = Sundram, middle column = Fandi, David already given. Picture graph of footprints on page 11. image_page 11."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "How many fewer rounds did David complete than Sundram?\n[?] rounds",
      "answer0": "12",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Sundram ran 14 rounds (7 feet x 2) and David ran 2 rounds (1 foot x 2). 14 - 2 = 12 fewer rounds.",
      "hints": ["Read both totals from the graph (each foot = 2 rounds).", "Sundram 14, David 2; subtract."],
      "source": "Tao Nan 2022 P3 Semestral Assessment 2 Q20",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "notes": "Refers to the same picture graph as Q19 (page 11); reproduce graph for context. Answer box labelled 'rounds'. Key page writes '12-2=10 ... David completed 10 fewer' but that arithmetic is inconsistent: David=2 (1 foot), Sundram=14 (7 feet), so 14-2=12. Manifest uses the figure-consistent value 12. image_page 11."
    }
  ]
}