B Set 99 Unknown

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        "subject": "arithmetic",
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                "id": 1,
                "type": "number-line",
                "subType": "find-midpoint",
                "question": "What is the midpoint between 4 and 28 on the number line?",
                "answer": 16,
                "correctAnswer": "16",
                "difficulty": "medium"
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                "id": 2,
                "type": "number-line",
                "subType": "place-number",
                "question": "On a number line from 0 to 20 with marks every 4, mark the number 16. What tick is it at?",
                "answer": 16,
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                "id": 3,
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                "question": "What is the midpoint between 3 and 33 on the number line?",
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                "id": 4,
                "type": "number-line",
                "subType": "place-number",
                "question": "On a number line from 0 to 20 with marks every 4, mark the number 12. What tick is it at?",
                "answer": 12,
                "correctAnswer": "12",
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                "id": 5,
                "type": "number-line",
                "subType": "find-midpoint",
                "question": "What is the midpoint between 5 and 37 on the number line?",
                "answer": 21,
                "correctAnswer": "21",
                "difficulty": "medium"
            },
            {
                "id": 6,
                "type": "number-line",
                "subType": "place-number",
                "question": "On a number line from 0 to 15 with marks every 3, mark the number 12. What tick is it at?",
                "answer": 12,
                "correctAnswer": "12",
                "difficulty": "medium"
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                "id": 7,
                "type": "number-line",
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                "correctAnswer": "14",
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                "id": 8,
                "type": "number-line",
                "subType": "place-number",
                "question": "On a number line from 0 to 20 with marks every 4, mark the number 8. What tick is it at?",
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                "id": 9,
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                "id": 10,
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                "subType": "place-number",
                "question": "On a number line from 0 to 10 with marks every 2, mark the number 8. What tick is it at?",
                "answer": 8,
                "correctAnswer": "8",
                "difficulty": "medium"
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                "id": 11,
                "type": "number-line",
                "subType": "identify-point",
                "question": "What number is at point A on the number line? [2...A...8]",
                "answer": 6,
                "correctAnswer": "6",
                "difficulty": "medium"
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                "id": 12,
                "type": "number-line",
                "subType": "place-number",
                "question": "On a number line from 0 to 5 with marks every 1, mark the number 4. What tick is it at?",
                "answer": 4,
                "correctAnswer": "4",
                "difficulty": "medium"
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                "id": 13,
                "type": "number-line",
                "subType": "identify-point",
                "question": "What number is at point A on the number line? [0...A...7]",
                "answer": 6,
                "correctAnswer": "6",
                "difficulty": "medium"
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                "id": 16,
                "type": "number-line",
                "subType": "find-midpoint",
                "question": "What is the midpoint between 0 and 22 on the number line?",
                "answer": 11,
                "correctAnswer": "11",
                "difficulty": "medium"
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            {
                "id": 18,
                "type": "number-line",
                "subType": "place-number",
                "question": "On a number line from 0 to 25 with marks every 5, mark the number 20. What tick is it at?",
                "answer": 20,
                "correctAnswer": "20",
                "difficulty": "medium"
            },
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                "id": 19,
                "type": "number-line",
                "subType": "find-midpoint",
                "question": "What is the midpoint between 4 and 24 on the number line?",
                "answer": 14,
                "correctAnswer": "14",
                "difficulty": "medium"
            },
            {
                "id": 20,
                "type": "number-line",
                "subType": "identify-point",
                "question": "What number is at point A on the number line? [5...A...10]",
                "answer": 9,
                "correctAnswer": "9",
                "difficulty": "medium"
            }
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        "layout": {
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    "_archetype": "form-exercise",
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