4 / 9, 9 / 20, , 39 / 86 - Number Series - Series Completion - Verbal Reasoning question

In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces. - 4 / 9, 9 / 20, , 39 / 86

A. 17 / 40

B. 19 / 42

C. 20 / 45

D. 29 / 53

E. None of the above

Answer: B. 19 / 42

The sequence in the numerators is + 5, + 10, + 20,.... and that in the denominators is + 11, + 22, + 44,...
So, the numerator of the missing fraction should be (9 + 10) i.e. 19 and the denominator shuld be (20 + 22) i.e. 42.

Posted in: Number Series - Series Completion - Verbal Reasoning