Multiple choice general knowledge math & puzzles

A shell is tied to the side of a boat. The shell hangs 3 metres above water level. The water rises 2cm an hour. How much time will it take before water touches the shell?

  1. 150 Hrs

  2. 3 Hrs

  3. 1 Hr

  4. None of the Above

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is a trick question testing logic. The shell is tied to the boat, so when water rises, the boat rises with it. The shell remains 3 metres above water level regardless of how much the water rises. Therefore the water will never touch the shell - the answer is "None of the Above" (no finite time).