## Quantitative Aptitude

### Sequence and Series

Question
15 out of 30

Find out missing number.

2/3, 4/7, ?, 11/21, 16/31

 A 5/9 B 6/11 C 7/13 D 9/17 E None of these

Ans. C Numerator & Denominator
2 + 2 = 4 & 3 + 4 = 7 so 4/7
4 + 3 = 7 & 7 + 6 = 13 so 7/13
7 + 4 = 11 & 13 + 8 = 21 so 11/21
11 + 5 = 16 & 21 + 10 = 31 so 16/31
increment in numerator is increasing by 1 every time like 2,3,4,5
Increment in denominator is increasing by 2 every time like 4,6,8,10
So, the missing term is 7/13.