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How many numbers among 1, 2, 3,  1000 are not divisible by 9?
 

 Apr 20, 2019
 #1
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Ok, so first you see is it ligma? or not

 Apr 20, 2019
 #2
avatar+62 
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IT IS LIGMA

 Apr 20, 2019
 #3
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ok so from 1-100 you find the closest number you multiply by to get the closest to 1000. In this case it is 111. so then you know 111 numbers are divisible by 9. 1000-111=889.

889 is the answer

 Apr 20, 2019
 #4
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Use complementary counting...

 

I think I answered this problem few weeks ago...Here: https://web2.0calc.com/questions/help_22327#r1

 Apr 20, 2019
 #5
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Hello, kk345!!

 

For this problem, the best way is to use complementary counting. Here's how:

 

There are 1000 numbers from 1-1000 inclusive. There are 111 multiples of 9 in the 1000 numbers.

 

Just evaluate 1000-111 to figure out how many numbers in 1-1000 inclusive are not divisible by 9.

 

There are 889 numbers in 1-1000 inclusive that are not divisible by 9.

 

~~Hypotenuisance

 Apr 21, 2019

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