Question

Akanksha was asked to multiply a number by its successor. But she was careless and multiplied the number by itself. When she rechecked, she found the error and added the original number to the final result. The result is ___ the actual answer.

• A. 1
• B. Less than
• C. Greater than
• D. Cannot be determined

Answer 1

The correct option is A

1

Let us express what Akanksha had to do and what she had done, mathematically.

To start with, let us start with assuming the number chosen by Akanksha as n.

What Akanksha had to do:
$n(n+1)=n^2+n$

What Akanksha had done:
$n\times n+n=n^2+n$, which is the same as before.