Question

If n is a natural number, then  \[\sqrt{n}\] is 

पर्याय

• always a natural number

• always an irrational number

• always an irrational number

• sometimes a natural number and sometimes an irrational number

Answer 1

The term “natural number” refers either to a member of the set of positive integer.1,2,3.

And natural number starts from one of counting digit .Thus, if n is a natural number then sometimes n is a perfect square and sometimes it is not.

Therefore, sometimes`sqrtn` is a natural number and sometimes it is an irrational number.