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Surds and Indices

Q1: 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

ANS:D - 1000

We know that 112 = 121. Putting m = 11 and n = 2, we get: (m - 1)n + 1 = (11 - 1)(2 + 1) = 103 = 1000.



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