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the four-digit numeral 3AA1 is divisible by 9. What digit does A represent?

 Apr 19, 2020
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a number is divisible by 9 is you can add all the digits up and that number is divisible by 9. 

 

So, we can make the equation 3+2A+1= x (x has to be a multiple of 9)

We can't make x=9 because then A would have to be a decimal.

So, let's make x=18.

 

3+2A+1=18

4+2A=18

2A=14

A=7

 

I hope this helped you, guest!

:)

 Apr 19, 2020

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