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How many multiples of 9 are between 100,000 and 100,185?

 May 22, 2021
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We find the first multiple of 9, start with 99999, add a 9 to get 100008

 

100008 to 100179, they are both mutlpies of 9, now count, we can't just give the answer. 
 

keep adding 9 from 100008 to 100179, see how many time you can add, that's how many multiples there are.

 May 22, 2021

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