Desmond plans to sell his homemade dog biscuits. He has baked 143,265 biscuits. He is planning to put 45 biscuits per package, and wonders if he will have any left over. Desmond knows a number is divisible by 45 if it is divisible by both 5 and 9. State the divisibility rule for 5 and 9.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter1: Variables, Expressions, And Integers
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Desmond plans to sell his homemade dog biscuits. He has baked 143,265 biscuits. He is planning to put 45 biscuits per package, and wonders if he will have any left over. Desmond knows a number is divisible by 45 if it is divisible by both 5 and 9. State the divisibility rule for 5 and 9. Show how to use them to determine if 143,265 is divisible by 45. Then explain why the divisibility rule for either 5 or 9 works.

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