Question 20

In question Nos. 20 and 21, select the missing number from the given responses.

The pattern followed here is (n x 2) + 1

(3 x 2) + 1 = 7

(7 x 2) + 1 = 15

(15 x 2) + 1 = 31.......

Hence, option C is the correct answer.

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