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
Option:
A. 17 / 40
B. 19 / 42
C. 20 / 45
D. 29 / 53
Answer: B . 19 / 42
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Justification:
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.
