[{"id": 1, "type": "short_answer", "skill": "computation", "question": "Calculate: 69 + 93", "difficulty": "medium", "explanation": "Add systematically.", "needs_review": false, "correct_answer": "162"}, {"id": 2, "type": "multiple_choice", "skill": "properties", "options": ["Associative property", "Distributive 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: 7 × 16", "difficulty": "medium", "explanation": "Multiply: 7×16=112", "needs_review": false, "correct_answer": "112"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 10 × 18", "difficulty": "medium", "explanation": "Multiply: 10×18=180", "needs_review": false, "correct_answer": "180"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 11 × 6", "difficulty": "medium", "explanation": "Multiply: 11×6=66", "needs_review": false, "correct_answer": "66"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 13 × 14", "difficulty": "medium", "explanation": "Multiply: 13×14=182", "needs_review": false, "correct_answer": "182"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 17 × 7", "difficulty": "medium", "explanation": "Multiply: 17×7=119", "needs_review": false, "correct_answer": "119"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 14", "difficulty": "medium", "explanation": "Multiply: 12×14=168", "needs_review": false, "correct_answer": "168"}]