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How many 7 s ...

Question

How many 7 s are there in the following number series which are preceded by 9 and also followed by 6?
7897653428972459297647

A

Two

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B

Three

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C

Four

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D

Five

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E

None

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Solution

The correct option is A Two
The 7 s satisfying the given conditions are shown below:
$789 7 - 65342897245629 7 - 647$
Hence, there are only 2 such 7.

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but immediately preceded by

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