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Q: Is 66 squared a rational number?

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28 squared is 784 which is a rational number

Yes, 225 squared is a rational number.

Yep, any rational number squared is also rational.

Yes because 7 squared = 49 which is a rational number

20 squared is 400 which is a rational number

Rational; 62 = 36. Any rational number that is squared is still rational.

Rational.

Rational.

The square root of 5 squared is 5, which is a rational number.

It is a rational number as 9

Yes

The square of any rational number is also rational.

7 squared = 49 which is a rational number because it can be expressed as a fraction in the form of 49/1

The square of any rational number is also rational.

All integers are rational numbers.

No, it is not.

Yes

Yes.

No because 102 squared is 10404 which is a rational number

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

Yes.

Yes.

Yes.

Yes.

4/25 squared is 16/625 = 0.0256 . That's a perfectly rational number.