Did you get it right?
This time puzzle asks for the real time when a slow clock shows 3:40.

The Answer
The correct answer is: 3:55.
Here is why
- A slow clock shows an earlier time than the real time.
- So add 15 minutes to 3:40.
- 3:40 plus 15 minutes is 3:55.
Why people miss it
The word slow is the key. If the clock is slow, the real time is later, not earlier.
What answer did you get before checking?