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How many three-digit numbers are not multiples of 7?

Guest Mar 14, 2015

Best Answer 

 #1
avatar+26406 
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999/7 is just over 142

 

100/7 is just over 14

 

so there are (142 - 14) = 128 numbers that are multiples of 7, hence there are 999-99-128 = 772 numbers that are not multiples of 7.

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Alan  Mar 14, 2015
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1+0 Answers

 #1
avatar+26406 
+10
Best Answer

999/7 is just over 142

 

100/7 is just over 14

 

so there are (142 - 14) = 128 numbers that are multiples of 7, hence there are 999-99-128 = 772 numbers that are not multiples of 7.

.

Alan  Mar 14, 2015

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