{
  "paper": {
    "school": "Henry Park",
    "year": 2023,
    "level": "P2",
    "label": "Quiz 1",
    "source_prefix": "Henry Park 2023 P2 Quiz 1",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "How many cubes are there altogether?",
      "answer0": "208",
      "answer1": "218",
      "answer2": "280",
      "answer3": "288",
      "correct_answer": 1,
      "skill_id": 29,
      "difficulty_id": 1,
      "explanation": "2 hundred-flats = 200. The remaining ten-rods and ones total 18, so 200 + 18 = 218.",
      "hints": ["Each large square (flat) is 100.", "Count the remaining tens and ones, then add to the hundreds."],
      "source": "Henry Park 2023 P2 Quiz 1 Q1",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 1,
      "image_loc": "middle of page, boxed figure below the question (two hundred-flats on top, a row of ten-rods below)",
      "notes": "Answer key = 2 (option 218). Base-ten blocks: 2 hundreds + 18 = 218."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "7 + 50 + 600 = [?]\nWhat is the answer?",
      "answer0": "567",
      "answer1": "657",
      "answer2": "756",
      "answer3": "810",
      "correct_answer": 1,
      "skill_id": 29,
      "difficulty_id": 1,
      "explanation": "600 + 50 + 7 = 657.",
      "hints": ["Add the hundreds, tens and ones.", "600 + 50 + 7."],
      "source": "Henry Park 2023 P2 Quiz 1 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key = 2 (657)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Add 80 to 111.\nWhat is the answer?",
      "answer0": "31",
      "answer1": "181",
      "answer2": "191",
      "answer3": "911",
      "correct_answer": 2,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "111 + 80 = 191.",
      "hints": ["Add 80 to 111.", "111 + 80 = 191."],
      "source": "Henry Park 2023 P2 Quiz 1 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key = 3 (191)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Subtract 12 from 981.\nWhat is the answer?",
      "answer0": "861",
      "answer1": "969",
      "answer2": "979",
      "answer3": "993",
      "correct_answer": 1,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "981 - 12 = 969.",
      "hints": ["Take 12 away from 981.", "981 - 12 = 969."],
      "source": "Henry Park 2023 P2 Quiz 1 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key = 2 (969)."
    },
    {
      "n": 5,
      "type_id": 2,
      "question": "In 580, which digit is in the ones place?\nThe digit is [?].",
      "answer0": "0",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 29,
      "difficulty_id": 1,
      "explanation": "In 580 the ones digit is 0 (5 hundreds, 8 tens, 0 ones).",
      "hints": ["The ones place is the right-most digit.", "Look at the last digit of 580."],
      "source": "Henry Park 2023 P2 Quiz 1 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q5 = 0 (numeric)."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "813 + 126 = [?]",
      "answer0": "939",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "813 + 126 = 939.",
      "hints": ["Add ones, then tens, then hundreds.", "813 + 126."],
      "source": "Henry Park 2023 P2 Quiz 1 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Vertical addition shown as 813 over +126; answer key = 939. Rendered as horizontal equation."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "456 - 268 = [?]",
      "answer0": "188",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 2,
      "explanation": "456 - 268 = 188.",
      "hints": ["Subtract with regrouping.", "456 - 268."],
      "source": "Henry Park 2023 P2 Quiz 1 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Vertical subtraction shown as 456 over -268; answer key = 188. Rendered as horizontal equation."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Sam is thinking of a 3-digit number. Read the clues given to find what the number is.\nClues:\n- It is an even number.\n- The sum of all the 3 digits is 9.\nSam's number is [?].",
      "answer0": "432",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 33,
      "difficulty_id": 2,
      "explanation": "Candidates 628, 117, 801, 432. Even numbers: 628 and 432. Digit sums: 6+2+8=16, 4+3+2=9. So 432 (even, digits sum to 9).",
      "hints": ["An even number ends in 0, 2, 4, 6 or 8.", "Add the three digits of each candidate; pick the one that sums to 9 and is even."],
      "source": "Henry Park 2023 P2 Quiz 1 Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 4,
      "image_loc": "centre of page, thought-bubble with four number cards (628, 117, 801, 432)",
      "notes": "Answer key = 432 (numeric). Figure shows the four candidate numbers."
    },
    {
      "n": 9,
      "type_id": 1,
      "question": "Circle the smallest number.",
      "answer0": "682",
      "answer1": "826",
      "answer2": "286",
      "answer3": "628",
      "correct_answer": 2,
      "skill_id": 31,
      "difficulty_id": 1,
      "explanation": "Smallest of 682, 826, 286, 628 is 286.",
      "hints": ["Compare the hundreds digit first.", "286 has the smallest hundreds digit (2)."],
      "source": "Henry Park 2023 P2 Quiz 1 Q9a",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Q9a 'Circle the smallest number' converted to MCQ; answer key 9a = 286."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Arrange these numbers from the greatest to smallest.\n99, 999, 109, 190\n[?], [?], [?], [?]",
      "answer0": "999",
      "answer1": "190",
      "answer2": "109",
      "answer3": "99",
      "correct_answer": null,
      "skill_id": 31,
      "difficulty_id": 2,
      "explanation": "Greatest to smallest: 999, 190, 109, 99.",
      "hints": ["Compare digit by digit from the largest place value.", "999 is the biggest; 99 is the smallest."],
      "source": "Henry Park 2023 P2 Quiz 1 Q9b",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Q9b ordering task; answer key 9b = 999, 190, 109, 99. Rendered as a 4-blank FIB."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "How many marbles are there altogether?\nThere are [?] marbles altogether.",
      "answer0": "326",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 29,
      "difficulty_id": 1,
      "explanation": "3 boxes of 100 = 300, 2 bags of 10 = 20, 6 loose marbles = 6. 300 + 20 + 6 = 326.",
      "hints": ["Each box holds 100, each bag holds 10.", "300 + 20 + 6."],
      "source": "Henry Park 2023 P2 Quiz 1 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 6,
      "image_loc": "top of page, 3-column table (Boxes of marbles / Bags of marbles / Marbles) showing three 100-boxes, two 10-bags and six loose marbles",
      "notes": "Q10(a) write answer in numbers; answer key 10a = 326. Part (b) words is handled in Q12 below. Count to verify: 3x100 + 2x10 + 6 = 326."
    },
    {
      "n": 12,
      "type_id": 1,
      "question": "How many marbles are there altogether?\nWrite your answer in words.",
      "answer0": "three hundred and twenty-six",
      "answer1": "three hundred and sixty-two",
      "answer2": "three hundred and six",
      "answer3": "thirty-two and six",
      "correct_answer": 0,
      "skill_id": 30,
      "difficulty_id": 1,
      "explanation": "326 in words is three hundred and twenty-six.",
      "hints": ["Read the number 326 aloud.", "300 = three hundred, 26 = twenty-six."],
      "source": "Henry Park 2023 P2 Quiz 1 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 6,
      "image_loc": "top of page, 3-column table (Boxes of marbles / Bags of marbles / Marbles) showing three 100-boxes, two 10-bags and six loose marbles",
      "notes": "Q10(b) write answer in words -> MCQ word options; answer key 10b = three hundred and twenty-six. Same figure as Q11."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Fill in the boxes with the correct numbers.\n2 [?] 7 + 5 [?] = 288",
      "answer0": "3",
      "answer1": "1",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 2,
      "explanation": "237 + 51 = 288, so the missing tens digit of the first number is 3 and the ones digit of the second is 1.",
      "hints": ["The total is 288; the addends are 2_7 and 5_.", "237 + 51 = 288."],
      "source": "Henry Park 2023 P2 Quiz 1 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Column addition with two boxes: 2[?]7 + 5[?] = 288. Answer key 11 = 237 + 51 = 288, so boxes are 3 (tens of top) and 1 (ones of bottom)."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Study the table shown. Complete the equation to find the total number of cubes.\n[?] + 36 = [?]",
      "answer0": "365",
      "answer1": "401",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 2,
      "explanation": "Top row: 3 hundreds + 6 tens + 5 ones = 365. Bottom row: 3 tens + 6 ones = 36. 365 + 36 = 401.",
      "hints": ["Read the place-value table: hundreds, tens, ones.", "365 + 36 = 401."],
      "source": "Henry Park 2023 P2 Quiz 1 Q12",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 7,
      "image_loc": "top of page, place-value table (Hundreds / Tens / Ones) with base-ten blocks; row 1 = 3 flats, 6 rods, 5 cubes; row 2 = 3 rods, 6 cubes",
      "notes": "Equation given as [box] + 36 = [box]. Answer key 12 = 365 + 36 = 401."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "a) Find the sum of 107 and 31. [?]\nb) Subtract 100 from your answer in (a). [?]",
      "answer0": "138",
      "answer1": "38",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "a) 107 + 31 = 138. b) 138 - 100 = 38.",
      "hints": ["First add 107 and 31.", "Then take 100 away from that sum."],
      "source": "Henry Park 2023 P2 Quiz 1 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two-part FIB; answer key 13 = a)138 b)38."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "Study the number pattern carefully.\n310, 312, [?], 311, 308, 310, 307, 309, 306\nWhat is the missing number in the box?\nThe missing number is [?].",
      "answer0": "309",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 32,
      "difficulty_id": 3,
      "explanation": "Reading every other term: 310, ?, 308, 307, 306 decreases by 1, but the interleaved sequence 312, 311, 310, 309 decreases by 1, so the missing term is 309.",
      "hints": ["Look at alternate boxes to find two patterns.", "The key gives the missing number as 309."],
      "source": "Henry Park 2023 P2 Quiz 1 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key 14 = 309. Sequence boxes: 310, 312, ?, 311, 308, 310, 307, 309, 306."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "Tim has 650 stickers in a bag. He has 100 fewer stickers than Sarah. How many stickers does Sarah have?\n[?] stickers",
      "answer0": "750",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "Tim has 100 fewer than Sarah, so Sarah has 650 + 100 = 750 stickers.",
      "hints": ["'100 fewer than Sarah' means Sarah has more.", "650 + 100 = 750."],
      "source": "Henry Park 2023 P2 Quiz 1 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key 15 = 750."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "There were 425 students in the hall at first. 317 students came into the hall later. How many students were there in the hall in the end?\nThere are [?] students in the hall in the end.",
      "answer0": "742",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "425 + 317 = 742 students in the hall in the end.",
      "hints": ["More students came in, so add.", "425 + 317 = 742."],
      "source": "Henry Park 2023 P2 Quiz 1 Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key 16 = 425 + 317 = 742."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "Mdm Lau had 167 stickers. She gave 79 stickers to her students. How many stickers did Mdm Lau have left?\nMdm Lau has [?] stickers now.",
      "answer0": "88",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "167 - 79 = 88 stickers left.",
      "hints": ["She gave some away, so subtract.", "167 - 79 = 88."],
      "source": "Henry Park 2023 P2 Quiz 1 Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key 17 = 167 - 79 = 88."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "Mike scored 545 points in a game. Sam scored 278 points in the same game. Jessica scored 126 more points than Sam.\nHow many fewer points did Sam score than Mike in the game?\nSam scored [?] fewer points than Mike in the game.",
      "answer0": "267",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "545 - 278 = 267, so Sam scored 267 fewer points than Mike.",
      "hints": ["'How many fewer' means subtract.", "545 - 278 = 267."],
      "source": "Henry Park 2023 P2 Quiz 1 Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Q18(a). Answer key 18a = 545 - 278 = 267."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "Mike scored 545 points in a game. Sam scored 278 points in the same game. Jessica scored 126 more points than Sam.\nHow many points did Jessica score in the game?\nJessica scored [?] points in the game.",
      "answer0": "404",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "Jessica scored 126 more than Sam: 278 + 126 = 404.",
      "hints": ["'126 more than Sam' means add to Sam's score.", "278 + 126 = 404."],
      "source": "Henry Park 2023 P2 Quiz 1 Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Q18(b). Answer key 18b = 278 + 126 = 404."
    }
  ]
}