In any day before noon how many times is the sum of the digits of the time equal to 15?
For instance 2:58 and 11:49 are two times when this is true.
On a regular 12-hour digital clock how many times would the same three digits in a row be displayed (e.g. 1:11,11:12,12:22) in one day?
Exactly how many minutes is it before seven o'clock, if 40 minutes ago it was three times as many minutes past two o'clock?