4/5
No.
Irrational
The square root of six divided by the square root of two equals the square root of three.
5 times the square root of two over 3 times the square root of two equals 5/3
The square root of four twenty-fifths, is two fifths, because of the fact that the square root of four is two and the square root of twenty-five is five.
the square root of 2 fifths of irrational is 0.565685425
The two square roots are irrational.
4/5
No.
3/5, ie root 9/root 25
Irrational
The square root of two times the square root of two equals two
The square root of six divided by the square root of two equals the square root of three.
H
5 times the square root of two over 3 times the square root of two equals 5/3
If this is supposed to be a riddle, it's not a very good one. The square root of the number whose square root is two is, obviously, two.