If 3 envelope-stuffers can process 3 envelopes in 3 seconds, how many stuffers are needed to process 100 envelopes in 100 seconds?
3 stuffers
Three stuffers processing 3 envelopes in 3 seconds means each stuffer takes 3 seconds to process 1 envelope. In 100 seconds, 1 stuffer can process 100/3 envelopes. Thus, 3 stuffers in 100 seconds will process 3 * (100/3) = 100 envelopes.
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: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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