[{"id": 1, "type": "short_answer", "skill": "equations", "question": "Solve: 3x + 7 = 22", "difficulty": "medium", "explanation": "Subtract 7: 3x=15. Divide by 3: x=5. Check: 3(5)+7=22 ✓", "needs_review": false, "correct_answer": "x = 5"}, {"id": 2, "type": "multiple_choice", "skill": "equations", "options": ["x = 4", "x = 8", "x = 32", "x = 14"], "question": "Solve: 2x = 16", "difficulty": "easy", "explanation": "Divide both sides by 2: x=16/2=8.", "needs_review": false, "correct_answer": "x = 8"}, {"id": 3, "type": "short_answer", "skill": "computation", "question": "Calculate: 19 × 10", "difficulty": "medium", "explanation": "Multiply: 19×10=190", "needs_review": false, "correct_answer": "190"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 5 × 2", "difficulty": "medium", "explanation": "Multiply: 5×2=10", "needs_review": false, "correct_answer": "10"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 8 × 14", "difficulty": "medium", "explanation": "Multiply: 8×14=112", "needs_review": false, "correct_answer": "112"}, {"id": 6, "type": "short_answer", "skill": "computation", "question": "Calculate: 19 × 17", "difficulty": "medium", "explanation": "Multiply: 19×17=323", "needs_review": false, "correct_answer": "323"}, {"id": 7, "type": "short_answer", "skill": "computation", "question": "Calculate: 11 × 11", "difficulty": "medium", "explanation": "Multiply: 11×11=121", "needs_review": false, "correct_answer": "121"}, {"id": 8, "type": "short_answer", "skill": "computation", "question": "Calculate: 11 × 3", "difficulty": "medium", "explanation": "Multiply: 11×3=33", "needs_review": false, "correct_answer": "33"}]