Q: Is the square root of 42 rational?

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Irrational.

is the square root of 3 rational

No, the square root of 1500 is not a rational number.

The square root of 225 is 15, which is a rational number.

Only if the square root of the numerator and the square root of the denominator are both rational numbers.

Related questions

The square root of 42 is an irrational number

Irrational.

The square root of 25 is 5 ... rational.

No, the square root of 1000 is not rational.

is the square root of 3 rational

The square root of 4 is 2. 2 is a rational number so they square root of 4 is rational.

The square root of 48 is a rational or irrational

No, the square root of 1500 is not a rational number.

It is rational. The root of a perfect square, such as 4, is rational; the root of any positive integer that is not a perfect square is an irrational number.

[ square root of (4.1) ] is irrational. But [ square root of (4) ] is rational.

Yes, it is the principal square root of 4, and it is rational.

Yes, it is the principal square root of 4, and it is rational.