No, it is not.
The square root of 64 is 8, which is a rational number.
Yes, they are.
The square root of 4 is 2 which is a rational number and also a prime number
No, 40 is a rational number.
No, it is not.
No, it is not.
The square root of 64 is 8, which is a rational number.
No. Radical(1.21) = 1.1, for example, is rational.
Yes, they are.
Yes, they are.
Sqrt(25) is -5 or +5, both of which are rational.
If the number inside the radical is a perfect square or a ratio of perfect squares.
The square root of 4 is 2 which is a rational number and also a prime number
No, 40 is a rational number.
Any integer (including 40) is classed as a rational number.
All integers, including 40, are rational numbers.