Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.2 - Prime and Composite Numbers - Problem Set 1.2 - Page 13: 50



Work Step by Step

Since the sum of the digits of $153$ is $9$, which is a multiple of $9$, this number is divisible by $9$. When we divide $153$ by $9$, we get $17$. The number $9$ can further be broken down into prime factors: $3\times3$. Since $3$ and $17$ are both prime numbers, the prime factorization of $153$ is $3\times3\times17$
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