Sunday, June 14, 2015

What is the value of C?

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

Given A+B+C = AB
AB means 10th digit is A and B is the units digits, AB is 10A+B

i.e; A+B+C = 10A+B
A+C = 10A
C = 9A

As C is a single digit number, A can be only 1.
If A = 1, C = 9.

Hence C is 9.


1 comment :

  1. We are the top Web Designing & Development Company in Chennai. We provide good quality designs, cheap web hosting, billing software’s, and E-Commerce and Portal websites.

    Web Designing Company in Chennai

    ReplyDelete