Did you get it right?
This clock puzzle asks you to adjust the time shown on the clock using the clue about whether it is fast or slow.

The Answer
The correct answer is: 5:24.
Here is why
- Fast means subtract 18 minutes.
- 5:42 – 18 minutes = 5:24.
Why people miss it
Clock wording is easy to reverse. A fast clock is ahead, so you subtract. A slow clock is behind, so you add.
What answer did you get before checking?