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Select the option that is related to the fifth number in the same way as the fourth number is related to the third number and the second number is rel
Question

Select the option that is related to the fifth number in the same way as the fourth number is related to the third number and the second number is related to the first number.
7:42 9:72:: 11:?

A.

110

B.

102

C.

121

D.

108

Correct option is A

Given:
7:42 9:72:: 11:?
Logic: 1st × (1st - 1) 
First pair: 7:42
7 × (7 - 1) = 7 × 6 = 42
Second pair: 9:72
9 × (9 - 1) = 9 ×8 = 72
Apply the Pattern to the Fifth Number For 11:?:
11 × (11 - 10) = 11 × 10 = 110
Correct answer is (a).

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