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For how many ordered pairs $(A,B)$ where $A$ and $B$ are positive integers is $AAA_7+BBB_7=666_7?$

 Dec 21, 2020
 #1
avatar+114320 
+1

We must have that

A + B  =  6

 

So 

(A ,  B)

1     5

5     1

4     2

2     4

3     3

 

 

cool cool cool

 Dec 21, 2020

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