[{"id": 1, "type": "short_answer", "skill": "computation", "question": "Calculate: 32 + 60", "difficulty": "medium", "explanation": "Add systematically.", "needs_review": false, "correct_answer": "92"}, {"id": 2, "type": "multiple_choice", "skill": "properties", "options": ["Commutative property", "Identity property", "Associative property", "Distributive 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: 17 × 11", "difficulty": "medium", "explanation": "Multiply: 17×11=187", "needs_review": false, "correct_answer": "187"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 16 × 4", "difficulty": "medium", "explanation": "Multiply: 16×4=64", "needs_review": false, "correct_answer": "64"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 15 × 18", "difficulty": "medium", "explanation": "Multiply: 15×18=270", "needs_review": false, "correct_answer": "270"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 10 × 6", "difficulty": "medium", "explanation": "Multiply: 10×6=60", "needs_review": false, "correct_answer": "60"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 5 × 16", "difficulty": "medium", "explanation": "Multiply: 5×16=80", "needs_review": false, "correct_answer": "80"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 5 × 15", "difficulty": "medium", "explanation": "Multiply: 5×15=75", "needs_review": false, "correct_answer": "75"}]