{
  "paper": {
    "school": "Raffles Girls",
    "year": 2022,
    "level": "P1",
    "label": "Review Assessment 2",
    "source_prefix": "Raffles Girls 2022 P1 Review Assessment 2",
    "has_answer_key": true,
    "notes": "Filename says 'Review Assessment 2' but the paper header and answer sheet both read 'Review Assessment 3-2 / Addition & Subtraction Within 40'. Spec says derive label from filename, so label/source use 'Review Assessment 2'."
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "3 + 6 + 7 = [?]",
      "answer0": "9",
      "answer1": "13",
      "answer2": "16",
      "answer3": "17",
      "correct_answer": 2,
      "skill_id": 13,
      "difficulty_id": 1,
      "explanation": "3 + 6 + 7 = 9 + 7 = 16.",
      "hints": ["Add the first two numbers first.", "3 + 6 = 9, then 9 + 7."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q1 = option (3) = 16."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "31 - 7 = [?]",
      "answer0": "24",
      "answer1": "26",
      "answer2": "36",
      "answer3": "38",
      "correct_answer": 0,
      "skill_id": 13,
      "difficulty_id": 1,
      "explanation": "31 - 7 = 24.",
      "hints": ["Take 7 away from 31.", "31 - 1 = 30, then 30 - 6 = 24."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q2 = option (1) = 24."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which is the correct addition equation for the picture?",
      "answer0": "10 + 14 = 24",
      "answer1": "10 + 15 = 25",
      "answer2": "11 + 15 = 26",
      "answer3": "11 + 16 = 27",
      "correct_answer": 2,
      "skill_id": 16,
      "difficulty_id": 2,
      "explanation": "Left group has 11 sharks, right group has 15 sharks; 11 + 15 = 26.",
      "hints": ["Count the sharks in each box.", "Left = 11, right = 15."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q3",
      "image_needed": true,
      "image_options": false,
      "image_file": "q3.png",
      "notes": "Answer key Q3 = option (3) = 11 + 15 = 26. Figure: two adjacent boxes of shark drawings (left 11, right 15), top of page below the question. Crop must show both boxes to count."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which is the correct subtraction equation for the picture?",
      "answer0": "31 - 12 = 19",
      "answer1": "30 - 12 = 18",
      "answer2": "30 - 13 = 17",
      "answer3": "31 - 13 = 18",
      "correct_answer": 3,
      "skill_id": 16,
      "difficulty_id": 2,
      "explanation": "31 apples in the grid with 13 crossed out: 31 - 13 = 18.",
      "hints": ["Count all the apples, then count the crossed-out ones.", "Total = 31, crossed out = 13."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q4",
      "image_needed": true,
      "image_options": false,
      "image_file": "q4.png",
      "notes": "Answer key Q4 = option (4) = 31 - 13 = 18. Figure: a 3-row grid of apple drawings with some crossed out, middle of page below the question. Crop must show all apples to count crossed-out ones."
    },
    {
      "n": 5,
      "type_id": 2,
      "question": "39 + 1 = [?]    16 + 18 = [?]",
      "answer0": "40",
      "answer1": "34",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 14,
      "difficulty_id": 1,
      "explanation": "5a: 39 + 1 = 40. 5b: 16 + 18 = 34.",
      "hints": ["Add the ones first, regroup if needed.", "5b: 6 + 8 = 14, carry 1 ten."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as two vertical column-addition sums 5a (39+1) and 5b (16+18). Combined into one FIB. Answer key Q5a = 40, Q5b = 34."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "Write a related subtraction equation based on the picture. [?] - [?] = [?]",
      "answer0": "39",
      "answer1": "13",
      "answer2": "16",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 16,
      "difficulty_id": 2,
      "explanation": "The picture shows 3 tens-rods and 9 unit cubes (39 total) with 1 rod and 3 cubes crossed out (13 removed): 39 - 13 = 16.",
      "hints": ["Count the base-ten blocks shown, then the crossed-out ones.", "Total = 39, crossed out = 13."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q6",
      "image_needed": true,
      "image_options": false,
      "image_file": "q6.png",
      "notes": "Answer key Q6 = 39 - 13 = 16. Converted from a write-the-equation task (blank box-O-box-=-box template) to a 3-blank FIB. Figure: base-ten tens-rods and unit cubes with some crossed out, middle of page below the question. Crop the blocks, exclude the empty answer-box template."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "40 - 7 = [?]    37 - 18 = [?]",
      "answer0": "33",
      "answer1": "19",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 14,
      "difficulty_id": 2,
      "explanation": "7a: 40 - 7 = 33. 7b: 37 - 18 = 19.",
      "hints": ["Regroup a ten when the ones are too small to subtract.", "7b: 37 - 18, borrow from the tens."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as two vertical column-subtraction sums 7a (40-7) and 7b (37-18). Combined into one FIB. Answer key Q7a = 33, Q7b = 19."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Farmer Brown collected 11 eggs on Monday. He collected 6 eggs on Tuesday. How many eggs did he collect on both days? He collected [?] eggs on both days.",
      "answer0": "17",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 15,
      "difficulty_id": 1,
      "explanation": "11 + 6 = 17 eggs.",
      "hints": ["Both days means add the two amounts.", "11 + 6 = 17."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q8 = 11 + 6 = 17. The box-O-box template (number-equation working) is dropped; the FIB captures the final fill-in 'He collected ___ eggs'."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Mr Koh bought 19 apples. Mrs Chan bought 5 fewer apples than Mr Koh. How many apples did Mrs Chan buy? Mrs Chan bought [?] apples.",
      "answer0": "14",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 15,
      "difficulty_id": 1,
      "explanation": "19 - 5 = 14 apples.",
      "hints": ["'5 fewer' means subtract 5.", "19 - 5 = 14."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q9 = 19 - 5 = 14. The box-O-box template is dropped; FIB captures the final fill-in 'Mrs Chan bought ___ apples'."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "The children's Math test scores are: Peter 20, Ravi 13, Amin 8, Tom 17. (a) Who scores the highest marks? [?] (b) How many more marks does Peter score than Ravi? [?] (c) How many fewer marks does Amin score than Tom? [?]",
      "answer0": "Peter",
      "answer1": "7",
      "answer2": "9",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 15,
      "difficulty_id": 2,
      "explanation": "(a) 20 is highest, so Peter. (b) 20 - 13 = 7. (c) 17 - 8 = 9.",
      "hints": ["Compare the four scores in the table.", "'More' and 'fewer' both mean subtract."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q10 a=Peter, b=7, c=9. Table transcribed into the stem (text, not a figure), so no image needed. Three blanks in a/b/c order."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "There are 3 friends: Lynn has 18 stickers, Cindy has 6 stickers, and Kyra has 4 more stickers than Lynn. (a) How many stickers does Lynn have? [?] (b) How many more stickers does Kyra have than Cindy? [?] (c) Which two children have 24 stickers altogether? [?] and [?]",
      "answer0": "18",
      "answer1": "16",
      "answer2": "Lynn",
      "answer3": "Cindy",
      "correct_answer": null,
      "skill_id": 15,
      "difficulty_id": 3,
      "explanation": "(a) Lynn has 18. (b) Kyra = 18 + 4 = 22; 22 - 6 = 16 more than Cindy. (c) Lynn 18 + Cindy 6 = 24, so Lynn and Cindy.",
      "hints": ["First work out how many Kyra has: 18 + 4.", "For (c), try adding pairs to reach 24."],
      "source": "Raffles Girls 2022 P1 Review Assessment 2 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q11 a=18, b=16, c=Lynn and Cindy. The speech-bubble values (Lynn 18, Cindy 6, Kyra '4 more than Lynn') are transcribed into the stem, so the cartoon figure is decorative and not required. Four blanks: 18, 16, Lynn, Cindy."
    }
  ]
}