SSC CGL 2014 Tier 1 20 July Second Sitting

Instructions

In each of the following questions, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Question 167

12, 27, 85, 345, ?

Solution

let the missing number be y

here the given sequence is 12, 27, 85, 345, y

we can see that

27 = 12 x 2 + 3

85 = 27 x 3 + 4

345 = 85 x 4 + 5

So from the existing pattern ,

y = 345 x 5 + 6 = 1731

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