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Is the square root of 16 a rational number or irrational number?
The square root of 16 is 4 which is a rational number
Is the square root of any composite numbers rational?
Yes, of some; the square root of any perfect square is rational - for example, the square root of 4, of 9, of 16, etc.On the other hand, if your "composite number" is not a perfect square, then its square root is irrational.
Can square roots be rational?
The square root of 16 is rational. The answer would be 4, so, yes; they can be rational.
Is negative square root 16 rational?
The negative square root of 16 is -4. It can be written as the ratio of 792 to -198, so it's rational.
Is the square root of 22 a rational number?
No, in fact unless an integer has an integral square root, the square root is always irrational. Note that some rational fractions can have rational square roots, though. Example: sqrt(4/9) = sqrt(4)/sqrt(9) = 2/3, which is rational. Or sqrt(9/16) = 3/4
