[{"id": 1, "type": "short_answer", "skill": "computation", "question": "Calculate: 32 + 62", "difficulty": "medium", "explanation": "Add systematically.", "needs_review": false, "correct_answer": "94"}, {"id": 2, "type": "multiple_choice", "skill": "properties", "options": ["Distributive property", "Associative property", "Commutative property", "Identity property"], "question": "Which property states a+0=a?", "difficulty": "easy", "explanation": "The identity property of addition states that adding 0 to any number gives that number.", "needs_review": false, "correct_answer": "Identity property"}, {"id": 3, "type": "short_answer", "skill": "computation", "question": "Calculate: 10 × 11", "difficulty": "medium", "explanation": "Multiply: 10×11=110", "needs_review": false, "correct_answer": "110"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 16 × 17", "difficulty": "medium", "explanation": "Multiply: 16×17=272", "needs_review": false, "correct_answer": "272"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 7 × 4", "difficulty": "medium", "explanation": "Multiply: 7×4=28", "needs_review": false, "correct_answer": "28"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 4 × 18", "difficulty": "medium", "explanation": "Multiply: 4×18=72", "needs_review": false, "correct_answer": "72"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 8 × 14", "difficulty": "medium", "explanation": "Multiply: 8×14=112", "needs_review": false, "correct_answer": "112"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 14 × 5", "difficulty": "medium", "explanation": "Multiply: 14×5=70", "needs_review": false, "correct_answer": "70"}]