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Q: What numbers will produce an irrational number when multiplied by 0.4?

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Every irrational number, when multiplied by 0.5 will produce an irrational number.

Any number which is irrational will produce an irrational number when multiplied by 0.5

Any irrational number multiplied by 0.5 will remain irrational. Any rational number multiplied by 0.5 will remain rational.

Every irrational number, when multiplied by 0.4 will produce an irrational number.

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

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.

Any irrational number, when added to 13, will produce an irrational number.

When added to a rational number, any irrational number will produce an irrational number.also, when added to an irrational number, any rational number will produce an irrational number.

Any irrational number will do.

Some irrational numbers can be multiplied by another irrational number to yield a rational number - for example the square root of 2 is irrational but if you multiply it by itself, you get 2 - which is rational. Irrational roots of numbers can yield rational numbers if they are raised to the appropriate power

Please don't write "the following" if you don't provide a list. Any rational number will work in this case. Any irrational number will not.

Any irrational number will do.

rational * irrational = irrational.

Any irrational number does.

Any irrational number does.

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.

You can't get an irrational number by applying a finite number of additions, subtractions, multiplications and divisions to a set of rational numbers.

If you multiply an irrational number by ANY non-zero rational number, the result will be irrational.

Yes, unless the rational number is 0.

The product will also be irrational.

If an irrational number is added to, (or multiplied by) a rational number, the result will always be an irrational number.

The product of two irrational numbers may be rational or irrational. For example, sqrt(2) is irrational, and sqrt(2)*sqrt(2) = 2, a rational number. On the other hand, (2^(1/4)) * (2^(1/4)) = 2^(1/2) = sqrt(2), so here two irrational numbers multiply to give an irrational number.

No. If it was a rational number, then it wouldn't be an irrational number.

Irrational numbers are real numbers.

No. All irrational numbers are real, not all real numbers are irrational.

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