Question

9 years ago Anisha was 12 years old. How old is she today?

• A. 18
• B. 21
• C. 12
• D. 9

Answer 1

The correct option is B 21

Let Anisha's present age be 'a' years.
Then 9 years ago, her age would have been 'a-9' years.
Given that
$a-9=12$
Adding 9 on both sides:
$a-9+9=12+9$
Hence $a=21$
Today Anisha is 21 years old