Question

In the given series
1, 8, 3, 5, 1, 3, 7, 8, 1, 5, 7, 3, 5, 8, 3, 1, 5, 3, 7, 1, 8, 3, 5, 3, 7, 8, 3, 5, 1, 7, 3, 7, 5, 1, 8, 3, 1, 7, 1, 8, 3, 8, 5, 1

How many times do the two consecutive (i.e. numbers one after the other) have a difference of $4$?

• A. $6$
• B. $9$
• C. $11$
• D. $13$

Answer 1

Answer: (A)

$6$

The set of consecutive numbers which have a difference of $4$ are $(5,1),(7,3),(5,1),(7,3),(5,1),(5,1)$.

Hence, total $6$ times the two consecutive numbers have a difference of $4$.