Smallest number one short of a multiple of 2 to 10
Question
What is the least positive integer such that, for each , dividing by leaves remainder ?
Short answer
. The condition says is divisible by every from to , so is a multiple of . The smallest choice is .
Adapted from Crack, Heard on the Street, Q1.27, p.14; question and answer rewritten by SelfMadeQuant.com.
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