Counting By 2s Medium — Set 54

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            "question": "Count by 10s: 0, 10, 20, 30, __",
            "answer": 40,
            "correctAnswer": "40",
            "difficulty": "medium"
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            "id": 2,
            "type": "counting",
            "subType": "count-objects",
            "question": "Count the squares: How many are there? (9 squares)",
            "answer": 9,
            "correctAnswer": "9",
            "difficulty": "medium"
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            "id": 3,
            "type": "counting",
            "subType": "skip-counting",
            "question": "What is the next number in the sequence? 10, __, 30, 40, 50",
            "answer": 20,
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            "id": 4,
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            "subType": "count-by",
            "question": "Count by 3s: 0, 3, 6, 9, __",
            "answer": 12,
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            "id": 5,
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            "subType": "what-comes-next",
            "question": "What comes after 1?",
            "answer": 2,
            "correctAnswer": "2",
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            "id": 8,
            "type": "counting",
            "subType": "count-by",
            "question": "Count by 3s: 3, 6, 9, 12, __",
            "answer": 15,
            "correctAnswer": "15",
            "difficulty": "medium"
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            "id": 9,
            "type": "counting",
            "subType": "what-comes-next",
            "question": "What comes after 7?",
            "answer": 8,
            "correctAnswer": "8",
            "difficulty": "medium"
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            "id": 12,
            "type": "counting",
            "subType": "count-by",
            "question": "Count by 5s: 0, 5, 10, 15, __",
            "answer": 20,
            "correctAnswer": "20",
            "difficulty": "medium"
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            "id": 13,
            "type": "counting",
            "subType": "what-comes-next",
            "question": "What comes after 9?",
            "answer": 10,
            "correctAnswer": "10",
            "difficulty": "medium"
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            "id": 14,
            "type": "counting",
            "subType": "count-objects",
            "question": "Count the triangles: How many are there? (10 triangles)",
            "answer": 10,
            "correctAnswer": "10",
            "difficulty": "medium"
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            "id": 15,
            "type": "counting",
            "subType": "what-comes-next",
            "question": "What comes after 6?",
            "answer": 7,
            "correctAnswer": "7",
            "difficulty": "medium"
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            "id": 17,
            "type": "counting",
            "subType": "count-objects",
            "question": "Count the triangles: How many are there? (4 triangles)",
            "answer": 4,
            "correctAnswer": "4",
            "difficulty": "medium"
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            "id": 18,
            "type": "counting",
            "subType": "count-objects",
            "question": "Count the stars: How many are there? (2 stars)",
            "answer": 2,
            "correctAnswer": "2",
            "difficulty": "medium"
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            "id": 19,
            "type": "counting",
            "subType": "skip-counting",
            "question": "What is the next number in the sequence? 3, 6, __, 12, 15",
            "answer": 9,
            "correctAnswer": "9",
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