Aptitude:: Surds and Indices

@ : Home > Aptitude > Surds and Indices > General Question - Discussion
 

If m and n are whole numbers such that mn = 121, the value of (m - 1)n +1 is:

A. 1 B. 10
C. 121 D. 1000

Answer: Option D

Explanation:

 

We know that 112 = 121.

Putting m = 11 and n = 2, we get:

(m - 1)n + 1 = (11 - 1)(2 + 1) = 103 = 1000.


Write your comments here:
Name *:     Email: