Instructions

What will come in place of the question mark (?) in the following number series ?

Question 150

36, 38.8, 42.8, ?, 54.4, 62

Solution

38.8 - 36 = 2.8

42.8 - 38.8 = 4

y - 42.8 =

54.4 - y =

62 - 54.4 = 7.6

Here we can sense that the difference between consecutive numbers is increasing by 1.2 so,

y - 42.8 = 5.2

y = 48

lets check this value in

54.4 - 48 = 6.6

5.2 + 1.2 = 6.6 (hence our theory got proved)

Correct answer is B

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