Briefly

A broken clock

A broken clock

Two clocks adjust with the time of Big Ben at twelve o'clock at night. One of them is broken and advances three minutes per hour. An hour and a quarter ago he stopped pointing at 16:48. Given that 24 hours have not yet passed,

What time does the clock indicate that it works well?

Solution

The wrong clock stopped at 4:48 p.m., that is, it had been running for 16 hours (the 48 minutes it marks are the ones it has advanced at that time). Then the other clock should dial 17 hours 15 minutes.