Question

all the square roots of all positive integers rational if no give an example of the square root that is a rational number

Answer 1

No.For example,√5,√2,√3,√7 etc. That's all.

Answer 2

every square root of positive numbers is not rational it is rational, irrational, it can reccur also so one example of rational root of positive number is √25,√16,...these gives a rational numbers