Question
Find the missing number in the following series?
3, 5, 5, 19, 7, 41, 9, ?
A. 61
B. 69
C. 71
D. 79
Answer: C. 71
Solution:
First series : 3, 5, 7, 9
3,5,7,9,11,13,15,…. The difference between two consecutive numbers is 2.
Second series : 5, 19, 41, ?
14,22,30,… difference between two consecutive numbers is a multiple of 8.
Next term is 41 + 30 i.e equal to 71.
So, series will be 5,19,41,71,..…
Hence, the answer is 71.
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