In the series, 6 4 1 2 2 8 7 4 2 1 5 3 8 6 2 1 7 1 4 1 3 2 8 6, how many pairs of successive numbers have a difference of 2 each?

Four

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Five

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Six

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Seven

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Solution

The correct option is C Six
6 4 1 2 2 8 7 4 2 1 5 3 8 6 2 1 7 1 4 1 3 2 8 6

Difference between two numbers a and b is always positive, i.e., $| a - b | = | b - a | .$
In the given sequence there are six such pairs that have a difference of $2.$
6, 4
4, 2
5, 3
8, 6
1, 3
8, 6

The answer is Option C

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