A watchmaker has three wall clocks. One clock is exactly 10 minutes fast, one is exactly 15 minutes slow, and one displays the correct time. Currently, the clocks display 2:00, 2:15, and 2:25. What is the correct time?
2:15.
If the actual time is 2:15, the clock that is 10 minutes fast displays 2:25, and the clock that is 15 minutes slow displays 2:00. This perfectly accounts for all three clock readings.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Hard. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
More logic riddles
Five runners finish a school marathon, and only these facts survive. Jonas finished ahead of Carmen. Pavel finished ahead of Jonas. Felix finished ahead of Pavel. Carmen finished ahead of Luca. Who finished last?
Five runners finish a school marathon, and only these facts survive. Jonas finished ahead of Nico. Elena finished ahead of Jonas. Mara finished ahead of Dmitri. Nico finished ahead of Mara. Who finished last?
If you paint a solid wooden cube completely blue, and then cut it into 27 smaller, identical cubes, how many of those smaller cubes will have blue paint on exactly two of their faces?
What is unique about the number 8,549,176,320?
A box without hinges, key, or lid, yet inside golden treasure is hid. What am I?
If five cats can catch five mice in five minutes, how many minutes does it take one cat to catch one mouse?

