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Q: Is two fifths a rational number?

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Yes.

It is a rational number.

To my knowlage yes it very much is a rational number :D I sounded smart xD

No.

the square root of 2 fifths of irrational is 0.565685425

two fifths

Rational

yes because you can put it as a over b

Yes, 7.8 is a rational number. Expressed as a top-heavy fraction, it is equal to 39/5 or thirty-nine fifths.

Two fifths of 25 is 10.

4/5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

Every time. The sum of two rational numbers MUST be a rational number.

38/5

You get a rational number.

It is always rational.

There are [countably] infinite rational number between any two rational numbers. There is, therefore, no maximum.

It is a rational number.

The product of two rational number is always rational.

The product of two rational numbers is always a rational number.

No, and I can prove it: -- The product of two rational numbers is always a rational number. -- If the two numbers happen to be the same number, then it's the square root of their product. -- Remember ... the product of two rational numbers is always a rational number. -- So the square of a rational number is always a rational number. -- So the square root of an irrational number can't be a rational number (because its square would be rational etc.).

It must be a generalised rational number. Otherwise, if you select a rational number to multiply, then you will only prove it for that number.

Yes 2/5 is a rational number

Each of the two numbers is a rational number.

0.4

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