ISEE Mathematics Achievement Question 66: Answer and Explanation
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Question: 66
10. A group left on a trip at 8:50 a.m. and reached its destination at 3:30 p.m. How long, in hours and minutes, did the trip take
- A. 3 hours 10 minutes
- B. 4 hours 40 minutes
- C. 5 hours 10 minutes
- D. 6 hours 40 minutes
Correct Answer: D
Explanation:
The correct answer is (D). First convert to a 24-hour clock.
3:30 p.m. = 15:30 o'clock
15:30 = 14:90
- 8:50 = -8:50
6:40 = 6 hours 40 minutes
To subtract a larger number of minutes from a smaller number of minutes, borrow 60 minutes from the hour to enlarge the smaller number.