Question

How many odd numbers are there in the following sequence which are immediately followed by an odd number?
51473985726315863852243496

• A. $2$
• B. $3$
• C. $4$
• D. More than $4$

Answer 1

Answer: (D)

More than $4$

We have to look for pattern of the form OO

$\underset{–}{51}4\underset{–}{739}8\underset{–}{57}26\underset{–}{315}863852243496$

Six occurrences

So option D