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Count each 7 ...

Question

Count each 7 which is NOT immediately preceded by 5 but is immediately followed by either 2 or 3. How many such 7 are there?
57265738373257273482678

A

2

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B

3

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C

4

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D

5

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Solution

The correct option is B 2
In the given series, 57265738373257273482678, there are 2 such 7's that are not immediately followed by 5 but are immediately followed by 2 or 3.
Answer is Option A

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