[{"id": 1, "type": "short_answer", "skill": "computation", "question": "Calculate: 56 + 68", "difficulty": "medium", "explanation": "Add systematically.", "needs_review": false, "correct_answer": "124"}, {"id": 2, "type": "multiple_choice", "skill": "properties", "options": ["Identity property", "Commutative property", "Distributive property", "Associative 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 × 11", "difficulty": "medium", "explanation": "Multiply: 8×11=88", "needs_review": false, "correct_answer": "88"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 5 × 3", "difficulty": "medium", "explanation": "Multiply: 5×3=15", "needs_review": false, "correct_answer": "15"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 7 × 19", "difficulty": "medium", "explanation": "Multiply: 7×19=133", "needs_review": false, "correct_answer": "133"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 5 × 14", "difficulty": "medium", "explanation": "Multiply: 5×14=70", "needs_review": false, "correct_answer": "70"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 8 × 5", "difficulty": "medium", "explanation": "Multiply: 8×5=40", "needs_review": false, "correct_answer": "40"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 7 × 19", "difficulty": "medium", "explanation": "Multiply: 7×19=133", "needs_review": false, "correct_answer": "133"}, {"id": 9, "type": "short_answer", "skill": "computation", "question": "Calculate: 14 × 7", "difficulty": "medium", "explanation": "Multiply: 14×7=98", "needs_review": false, "correct_answer": "98"}, {"id": 10, "type": "short_answer", "skill": "computation", "question": "Calculate: 20 × 15", "difficulty": "medium", "explanation": "Multiply: 20×15=300", "needs_review": false, "correct_answer": "300"}, {"id": 11, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 2", "difficulty": "medium", "explanation": "Multiply: 12×2=24", "needs_review": false, "correct_answer": "24"}, {"id": 12, "type": "short_answer", "skill": "computation", "question": "Calculate: 8 × 18", "difficulty": "medium", "explanation": "Multiply: 8×18=144", "needs_review": false, "correct_answer": "144"}]