Question

At which of these instances the time shown by a 12-hour and a 24-hour clock would not be same?

• A. 8 O' clock in the morning
• B. Half past 12 in the afternoon
• C. 2 O' clock in the afternoon
• D. 4 O' clock in the morning

Answer 1

The correct option is C 2 O' clock in the afternoon

We know that for converting a given time in 12-hour format to 24-hour format, we add 12 hours to the time if it is more than 1 pm.
But if the time is less than 1 pm, then the time shown by a 12-hour and a 24-hour clock will be same.
In the given options, only one option "2 O' clock in the afternoon" is more than 1 pm.
So, in this case time in 12-hour format = 02:00
Time in 24-hour format = 02:00 + 12:00
= 14:00
$\therefore$ The time by a 24-hour and a 12-hour clock will be different only in this case.