Aptitude - Surds and Indices - Discussion
Discussion Forum : Surds and Indices - General Questions (Q.No. 13)
13.
If m and n are whole numbers such that mn = 121, the value of (m - 1)n + 1 is:
Answer: Option
Explanation:
We know that 112 = 121.
Putting m = 11 and n = 2, we get:
(m - 1)n + 1 = (11 - 1)(2 + 1) = 103 = 1000.
Discussion:
13 comments Page 2 of 2.
Siri said:
10 years ago
How can we assumed exact n value as 2 here as a natural number are whole number.
Ankit Agarwal said:
1 decade ago
121^1 so m=121 n=1 in this case answer is 120^2.
Krishna said:
1 decade ago
For 121 it is ok, if it is not 121 then?
if 16, we can assume 2^4 or 4^2.
is there other method ?
if 16, we can assume 2^4 or 4^2.
is there other method ?
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