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Which of the following is not a rational number?

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answer is A.

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Detailed Solution

Concept- A non-terminating, non-repeating decimal number would be one that continues indefinitely with no group of digits repeating indefinitely. Because decimals of this type cannot be represented as fractions, they are irrational numbers.

Here, the decimal representation of

is non-terminating non repeating.
Therefore,

is not a rational number.
Hence, the correct answer is option 1)

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