B Set 50 Unknown

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        "subject": "arithmetic",
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        "problems": [
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                "id": 1,
                "type": "counting",
                "subType": "count-by",
                "question": "Count by 10s: 430, 440, 450, 460, __",
                "answer": 470,
                "correctAnswer": "470",
                "difficulty": "normal"
            },
            {
                "id": 2,
                "type": "counting",
                "subType": "count-objects",
                "question": "Count the dots: How many are there? (949 dots)",
                "answer": 949,
                "correctAnswer": "949",
                "difficulty": "normal"
            },
            {
                "id": 3,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 969?",
                "answer": 970,
                "correctAnswer": "970",
                "difficulty": "normal"
            },
            {
                "id": 4,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 375?",
                "answer": 376,
                "correctAnswer": "376",
                "difficulty": "normal"
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                "id": 5,
                "type": "counting",
                "subType": "count-objects",
                "question": "Count the apples: How many are there? (119 apples)",
                "answer": 119,
                "correctAnswer": "119",
                "difficulty": "normal"
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            {
                "id": 6,
                "type": "counting",
                "subType": "skip-counting",
                "question": "What is the next number in the sequence? 315, 320, __, 330, 335",
                "answer": 325,
                "correctAnswer": "325",
                "difficulty": "normal"
            },
            {
                "id": 7,
                "type": "counting",
                "subType": "count-by",
                "question": "Count by 5s: 220, 225, 230, 235, __",
                "answer": 240,
                "correctAnswer": "240",
                "difficulty": "normal"
            },
            {
                "id": 8,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 669?",
                "answer": 670,
                "correctAnswer": "670",
                "difficulty": "normal"
            },
            {
                "id": 9,
                "type": "counting",
                "subType": "count-objects",
                "question": "Count the hearts: How many are there? (181 hearts)",
                "answer": 181,
                "correctAnswer": "181",
                "difficulty": "normal"
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                "id": 10,
                "type": "counting",
                "subType": "skip-counting",
                "question": "What is the next number in the sequence? 360, 362, 364, __, 368",
                "answer": 366,
                "correctAnswer": "366",
                "difficulty": "normal"
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                "id": 11,
                "type": "counting",
                "subType": "count-objects",
                "question": "Count the flowers: How many are there? (151 flowers)",
                "answer": 151,
                "correctAnswer": "151",
                "difficulty": "normal"
            },
            {
                "id": 12,
                "type": "counting",
                "subType": "count-objects",
                "question": "Count the dots: How many are there? (404 dots)",
                "answer": 404,
                "correctAnswer": "404",
                "difficulty": "normal"
            },
            {
                "id": 13,
                "type": "counting",
                "subType": "skip-counting",
                "question": "What is the next number in the sequence? 495, __, 505, 510, 515",
                "answer": 500,
                "correctAnswer": "500",
                "difficulty": "normal"
            },
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                "id": 14,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 225?",
                "answer": 226,
                "correctAnswer": "226",
                "difficulty": "normal"
            },
            {
                "id": 15,
                "type": "counting",
                "subType": "skip-counting",
                "question": "What is the next number in the sequence? 482, 484, __, 488, 490",
                "answer": 486,
                "correctAnswer": "486",
                "difficulty": "normal"
            },
            {
                "id": 16,
                "type": "counting",
                "subType": "count-objects",
                "question": "Count the hearts: How many are there? (711 hearts)",
                "answer": 711,
                "correctAnswer": "711",
                "difficulty": "normal"
            },
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                "id": 17,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 199?",
                "answer": 200,
                "correctAnswer": "200",
                "difficulty": "normal"
            },
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                "id": 18,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 408?",
                "answer": 409,
                "correctAnswer": "409",
                "difficulty": "normal"
            },
            {
                "id": 19,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 326?",
                "answer": 327,
                "correctAnswer": "327",
                "difficulty": "normal"
            },
            {
                "id": 20,
                "type": "counting",
                "subType": "what-comes-next",
                "question": "What comes after 758?",
                "answer": 759,
                "correctAnswer": "759",
                "difficulty": "normal"
            }
        ],
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    "_archetype": "form-exercise",
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