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In the series, how many pairs of altern...

In the series,
how many pairs of alternate numbers have a difference of 2 ?

6 4 1 2 2 8 7 4 2 1 5 3 8 6 2 1 7 1 4 1 3 2 8 6

1) 1
2) 2
3) 3
4 ) 4
5) None of these

A

Four

B

Three

C

One

D

Two

Text Solution

Verified by Experts

The correct Answer is:
D
Pairs of alternate numbers:
(6, 1), (4, 2), (1, 2), (2, 8), (2, 7), (8, 4), (7, 2), (4, 1), (2,5), (1,3), (5,8), (3,6), (8, 2), (6, 1), (2,7), (1, 1), (7,4), (1, 1), (4,3), (1, 2), (3, 8) and (2, 6).
Pairs with a difference of 2,
(4,2),(1,3), i.e. (4 – 2) = 2, (3-1)=2
Therefore, total number of such pairs = 2.
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