Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - 5.1 Number Theory: Prime and Composite Numbers - Exercise Set 5.1: 120

Answer

The given number is not divisible by $3$.

Work Step by Step

A number is divisible by $3$ if the sum of all its digits is divisible by $3$. The sum of the digits of the given number is: $=1+2+5+4+1+7+5+0 \\=25$ Note that $25$ is not divisible by $3$. Thus, the given number is not divisible by $3$.
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