Q. Consider the following sequence of numbers:
51473985726315863852243496
How many odd numbers are followed by the odd number in the above sequence?
(a) 5
(b) 6
(c) 7
(d) 8
Correct Answer: (b) 6
Question from UPSC Prelims 2020 CSAT Paper
Explanation :
(5,1) (7,3) (3,9) (5,7) (3,1) (1,5)
