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Sixth Grade Challenging Math

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6-24)   Answer

                         23 x 25 x 27

 

Tip: Use the rules:

A number is divisible by 5 if the digit in ones place is 5 or 0.

A number is divisible by 3 if the sum all digits is divisible by 3.

 

First divide 15525 by 5, then by 5 again.  Divide the quotient (621) by 3 and then by 3, and then by 3 again.

 
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