A display showing the 24-hour time (0000 to 2359) uses some or all of seven lights for each digit as follows:What is the greatest number of lights on at any time?
Correct answer: D. 28
- A. 25
- B. 26
- C. 27
- D. 28
Explanation
In the 24-hour time format, each digit can have a maximum of seven lights on. Since there are four digits in total (two for the hours and two for the minutes), the greatest number of lights on at any time would be when all digits have all seven lights on, which totals to 28 lights. Options A, B, and C do not account for the possibility of having all lights on for each digit, making them incorrect.
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