If 5 cats can catch 5 mice in 5 minutes, how many cats would be needed to catch 100 mice in 100 minutes?
5 cats
1 cat catches 1 mouse in 5 minutes, meaning 1 cat catches 20 mice in 100 minutes. Thus, 5 cats can catch 5 * 20 = 100 mice in 100 minutes.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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