[{"id": 1, "type": "short_answer", "skill": "computation", "question": "Calculate: 95 + 95", "difficulty": "medium", "explanation": "Add systematically.", "needs_review": false, "correct_answer": "190"}, {"id": 2, "type": "multiple_choice", "skill": "properties", "options": ["Commutative property", "Associative property", "Distributive 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: 8 × 5", "difficulty": "medium", "explanation": "Multiply: 8×5=40", "needs_review": false, "correct_answer": "40"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 3 × 5", "difficulty": "medium", "explanation": "Multiply: 3×5=15", "needs_review": false, "correct_answer": "15"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 2 × 10", "difficulty": "medium", "explanation": "Multiply: 2×10=20", "needs_review": false, "correct_answer": "20"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 18 × 12", "difficulty": "medium", "explanation": "Multiply: 18×12=216", "needs_review": false, "correct_answer": "216"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 17 × 5", "difficulty": "medium", "explanation": "Multiply: 17×5=85", "needs_review": false, "correct_answer": "85"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 13", "difficulty": "medium", "explanation": "Multiply: 12×13=156", "needs_review": false, "correct_answer": "156"}]