Question

is every irrational no is a surd

Answer 1

Be careful though, only the square roots which are irrational numbers are known as surds. If a square root has an exact decimal answer then it isn't a surd. So isn't a surd, because it is a rational number – '10'.

Answer 2

Only the square roots which are irrational numbers are known as surds. If a square root has an exact decimal answer then it isn't a surd. So isn't a surd, because it is a rationalnumber.