Best Answer

When it is a real number that cannot be expressed as a ratio of two integers.

Study guides

☆☆

Q: When is a number irrational?

Write your answer...

Submit

Still have questions?

Related questions

An irrational number.

No. The sum of an irrational number and any other [real] number is irrational.

The sum of a rational and irrational number must be an irrational number.

rational * irrational = irrational.

No, 3.56 is not an irrational number. 3.56 is rational.

-Pi is irrational, because it does not terminate or repeat. Whenever you multiply an irrational number by a rational number (-1), the result is an irrational number.

A negative irrational number can be thought of as an irrational number multiplied by -1, or an irrational number with a minus sign in front of it.

At least one of the factors has to be irrational.* An irrational number times ANY number (except zero) is irrational. * The product of two irrational numbers can be either rational or irrational.

No. this is not a irrational number

It is not an irrational number!

Any irrational number, when multiplied by 0.5 will give an irrational number.

Any irrational number, added to 0.4 will give an irrational number.