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Suppose b and c are positive integers.

When b^2 is written in base c, the result is 121_c. When c^2 is written in base , the result is 71_b.

What is b+c?

 Oct 4, 2020
 #1
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b + c = 15.

 Oct 4, 2020
 #2
avatar+111981 
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Some of you question is missing.

 Oct 4, 2020
 #3
avatar+31498 
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To put a little flesh on Guest#1'sanswer, and assuming the question is 

"When b^2 is written in base c, the result is 121_c. When c^2 is written in base b, the result is 71_b."

we have:

 Oct 4, 2020

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