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

 Dec 29, 2021
 #1
avatar+23186 
+2

The sum of the digits must be divisible by 9:  3771

 Dec 29, 2021
 #2
avatar+179 
+1

Thanks you so very much!

 Dec 29, 2021
 #3
avatar+675 
+2

Hello SmartWater,

 

the divisibility rule of 9 applies so that the cross sum of the number is divisible by 9. The number is 3AA1. Only 7 can be used for A (3 + 7 + 7 + 1 = 18 -> 18 is divisible by 9).

 

Straight

 Dec 29, 2021
 #4
avatar+179 
+1

Thank you both for your time to help!

 Jan 2, 2022

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