If it can be expressed as a ratio of two integers, p and q (q not 0) then it is rational. Except in some trivial cases, it is not easy to know if a number is not rational - and is therefore irrational.
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It is always rational.
Irrational.
The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.
It will be irrational.
No.A rational times an irrational is never rational. It is always irrational.