IBPS Government Jobs Exams Numerical Ability Sequence and Series

How many such sevens are there in the given series each of which is immediately preceded by 9 and also immediately followed by 8?

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IBPS Other Question

Statements: Some robots aremachines. Some computers are both robots andmachines. Some animal are machines. Some toys are animals.
Conclusions:
I. Some toys are robots.
II. Some toys are machines.
III. Some animals are computers.
IV.Some robots are not toys. How many such odd numbers are there in the given series each of which is immediately preceded by an even number?