Question

Find the value of A and B in the following.

$3A+25\underset{–}{}B2\underset{–}{}$

• A. A = 7, B = 5
• B. A = 6, B = 7
• C. A = 6, B = 6
• D. A = 7, B = 6

Answer 1

The correct option is D

A = 7, B = 6

Let us consider the ones place first.
Since, the last digit of A + 5 = 2, A can be = 7 which gives 7 + 5 = 12.
Accordingly , B = 1 (carried over ) + 3 + 2 = 6.
Hence, A= 7 and B =6

$37+25\underset{–}{}62\underset{–}{}$