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Q: When is a number both rational and irrational?

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No, no number can be both rational and irrational.

It will be irrational.

Integers are rational. In the set of real numbers, every number is either rational or irrational; a number can't be both or neither.

It is rational.A number cannot be both rational and irrational.

If it can't be expressed as a fraction then it is an irrational number

The number 3 is a rational number (as is any integer).

No number can be both rational and irrational. And, at the level that you must be for you to need to ask that question, a number must be either rational or irrational (ie not neither). 0.555555 is rational.

There is no such thing as a number that is both rational and irrational. By definition, every number is either rational or irrational.

The product of an irrational number and a rational number, both nonzero, is always irrational

No. Irrational means "not rational". A number either is rational, or it is not rational - tercium non datur.

-34 is a rational number

10.01 is a rational number

Yes. A number can be either rational or irrational, but never both; otherwise there would be an inherent contradiction.

Integers and fractions that have integers in the numerator and denominator are rational. A number can't be rational and irrational at the same time - irrational means "not rational".

By definition, an irrational number is a number that is not rational, or in other words a number that cannot be expressed as an integer divided by another integer. A number cannot be both "rational" and "not rational."

No, they are two separate groups of numbers. A number is either rational or irrational, never both.

It is a rational number.

Real numbers can be rational or irrational because they both form the number line.

They are both rational.

Rational

It is a rational number

0.727272 is the ratio of 727,272 and 1,000,000. So it's nice and rational.

No rational number is an irrational number.

they are both numbers

Irrational.