小學6年級數學一問

A=9, B=2, C=1

First of all,we find that:
A+B+1=B+10
A=9

We also find that C must be 1,
it is because even B is 8
9+8=17
So,
..9B
+B9
____
1B1

Finally, B must be 2, it's because only 2 can fit in this equation,
92+29=121