Question

How many 6's are there in the following sequence, which are either immediately preceded by 2 or immediately followed by 9 ?
5624369267164768263469862

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is D $4$

As given we look for 26 or 69 in the series.

$56243\underset{–}{69}\underset{–}{26}7164768\underset{–}{26}34\underset{–}{69}862$

Four such occurrences.

so option D