Question
Logical Reasoning Question on Series
Find the missing link in the sequences given in the question.
4/9, 9/20, (?), 39/86
A
17/40
B
19/42
C
20/45
D
29/53
Answer
19/42
Explanation
Solution
As we can clearly observe in the numerator, the numerator of the previous term is multiplied by 2 and 1 is added. So numerator will be 9(2)+1=19
Similarly, denominator of the previous term is multiplied by 2 and then 2 is added. So 20(2)+2=42
Hence the fraction will be 19/42
The correct answer is (B) : 19/42