Question

If the digits A, B and C are added, the sum is the two-digit number AB as shown. What is the value of C?

A
B
+ C
______
AB

Answer 1

C=9

Explanation:

If A, B, and C are all single digits the mimimum sum for AB would be 10 as it is a two-digit number (or 11 if you do not consider 0 a digit)

AB-(A+B)=C

10-(1+0)=9 or 11-(1+1)=9

therefore C=9