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Q: Is 8 over 21 a rational or irrational number?

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No. The square root of an integer is either an integer, or an irrational number.

Rational.

You wont be able to add a rational number and an irrational number and get a number not in a fraction ( 3 + 22/7) (21/7 + 22/7 = 43/7) So, yes as you see in the example above it made another irrational number.

No - numbers are neither irrational nor rational.Ans 2Well, it is true that 21 is not irrational.As to being rational, every integer is rational.Proof : Take an integer n, add it to itself.Now look at (n+n)/2. It is obviously rational, but equally obviously it reduces to n.

Yes because it can be expressed as a fraction in the form of 21/2

Related questions

It is equal to 21/2 which is a rational number

21 is a rational number.

21/3 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

irrational

It is rational because it can be expressed as a fraction which is 21/5

No. The square root of an integer is either an integer, or an irrational number.

Rational.

Yes. Any whole number is rational. An irrational number is one that goes on forever without repeating, like √2=1.414213...

0.21 is a rational number because it can be expressed as a fraction in the form of 21/100

21/71 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

21 is an integer which is also a rational number because it can be expressed as a fraction in the form of 21/1

You wont be able to add a rational number and an irrational number and get a number not in a fraction ( 3 + 22/7) (21/7 + 22/7 = 43/7) So, yes as you see in the example above it made another irrational number.

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