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Select the option that is related to the seventh number in file same way as the second number is related to the first number. the fourth number is relat
Question

Select the option that is related to the seventh number in file same way as the second number is related to the first number. the fourth number is related to file third number and file sixth number is related to the fifth number.
25 : 4 : : 49 : 6 : : 9 : 2 : : 100 : ?

A.

9

B.

6

C.

4

D.

7

Correct option is A

Logic: 1 is subtracted from square root of first number to get second number.
As,
25 : 4
√25 -1 = 5-1 = 4
And
49 : 6
√49 -1 = 7-1 = 6
And
9 : 2
√9 -1 = 3-1 = 2
Similarly,
100 : ?
√100 -1 = 10-1 = 9
So, the missing number is 9.
Thus, correct option is (a).

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