Instructions

In each of these questions a number series is given. Below the series one number is given followed by (a), (b), (c),
(d) and (e). You have to complete this series following the same logic as in the original series and answer the question that follows.

Question 92

15, 9, 8, 12, 36, 170
19 (a) (b) (c) (d) (e)
What will come in place of (b) ?

Solution
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The pattern followed is :

15 $$\times 1 - (1 \times 6)$$ = 9

9 $$\times 2 - (2 \times 5)$$ = 8

8 $$\times 3 - (3 \times 4)$$ = 12

12 $$\times 4 - (4 \times 3)$$ = 36

36 $$\times 5 - (5 \times 2)$$ = 170

Similarly,

19 $$\times 1 - (1 \times 6)$$ = 13

13 $$\times 2 - (2 \times 5)$$ = 16

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