[{"id": 1, "type": "short_answer", "skill": "area", "question": "Find the area of a rectangle: length=8, width=7", "difficulty": "medium", "explanation": "A=l×w=8×7=56 sq units.", "needs_review": false, "correct_answer": "56"}, {"id": 2, "type": "multiple_choice", "skill": "perimeter", "options": ["15", "30", "32", "56"], "question": "Find the perimeter of a rectangle: length=8, width=7", "difficulty": "medium", "explanation": "P=2(l+w)=2(8+7)=2(15)=30", "needs_review": false, "correct_answer": "30"}, {"id": 3, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 12", "difficulty": "medium", "explanation": "Multiply: 12×12=144", "needs_review": false, "correct_answer": "144"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 17 × 5", "difficulty": "medium", "explanation": "Multiply: 17×5=85", "needs_review": false, "correct_answer": "85"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 11", "difficulty": "medium", "explanation": "Multiply: 12×11=132", "needs_review": false, "correct_answer": "132"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 3 × 8", "difficulty": "medium", "explanation": "Multiply: 3×8=24", "needs_review": false, "correct_answer": "24"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 6 × 5", "difficulty": "medium", "explanation": "Multiply: 6×5=30", "needs_review": false, "correct_answer": "30"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 9 × 8", "difficulty": "medium", "explanation": "Multiply: 9×8=72", "needs_review": false, "correct_answer": "72"}, {"id": 9, "type": "short_answer", "skill": "computation", "question": "Calculate: 5 × 10", "difficulty": "medium", "explanation": "Multiply: 5×10=50", "needs_review": false, "correct_answer": "50"}, {"id": 10, "type": "short_answer", "skill": "computation", "question": "Calculate: 11 × 16", "difficulty": "medium", "explanation": "Multiply: 11×16=176", "needs_review": false, "correct_answer": "176"}, {"id": 11, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 15", "difficulty": "medium", "explanation": "Multiply: 12×15=180", "needs_review": false, "correct_answer": "180"}, {"id": 12, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 3", "difficulty": "medium", "explanation": "Multiply: 12×3=36", "needs_review": false, "correct_answer": "36"}]