In the addition problem find the digit represented by C. Each time a letter appears it represent the same digit. A does not equal 0 (zero).

Question

AB
AB
AB
+ AB
______
CA
please explain your results
Thanks

Answer 1

since 4B = A with a carry,
B > 2 and A is a multiple of 4.

Since 4A plus the carry generates no carry, 4A < 9 or A <= 2

So, I'd say A=2 and B can be 3 or 8, but 4*28 is 3 digits, so we have

23+23+23+23 = 92

Answer 2

Aba
+bab
---------
Ccc

All posible values for all

Answer 3

RNFNF