[{"id": 1, "type": "short_answer", "question": "Evaluate: 8 + (-9)", "correct_answer": "-1"}, {"id": 2, "type": "multiple_choice", "options": ["84 square units", "40 square units", "90 square units", "20 square units"], "question": "What is the area of a rectangle with length 6 and width 14?", "correct_answer": "84 square units"}, {"id": 3, "type": "short_answer", "question": "Evaluate: -10 + (-3)", "correct_answer": "-13"}, {"id": 4, "type": "true_false", "question": "The square root of 81 is 9.", "correct_answer": "True"}, {"id": 5, "type": "short_answer", "question": "Evaluate: 10 + (-5)", "correct_answer": "5"}]