[{"id": 1, "type": "multiple_choice", "options": ["20 square units", "40 square units", "75 square units", "80 square units"], "question": "What is the area of a rectangle with length 5 and width 15?", "correct_answer": "75 square units"}, {"id": 2, "type": "true_false", "question": "The square root of 81 is 9.", "correct_answer": "True"}, {"id": 3, "type": "short_answer", "question": "What is 80% of 150?", "correct_answer": "120"}, {"id": 4, "type": "multiple_choice", "options": ["45 square units", "60 square units", "36 square units", "18 square units"], "question": "What is the area of a rectangle with length 15 and width 3?", "correct_answer": "45 square units"}, {"id": 5, "type": "short_answer", "question": "Evaluate: -2 + (-9)", "correct_answer": "-11"}]