MathCastle
Proof Writing & Problem SolvingEasy

Proof Writing & Problem Solving · Easy problem

All variables range over S={1,2,…,10}S = \{1, 2, \ldots, 10\}. For how many yy in SS is the statement "there is an xx with 1<x<y1 < x < y and xx divides yy" true?

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