$57$ is an ____ number.

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Detailed Solution

57

is an irrational number.
We can observe that the number

57

contains the radical

7

which is an irrational number.
This is because it is a non-terminating and non-recurring decimal and hence cannot be represented as a fraction. So, the number

57

cannot be expressed as a fraction because it is the product of

5

and

7

.
Hence, it is an irrational number.

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