Question

F n is a natural number then√n is (a) always a natural number (b)always an irrational number (c)always a rational number(d) sometimes a natural number and sometimes an irrational number

Answer 1

(d) sometimes a natural number and sometimes an irrational number

Explanation:

Consider the natural numbers 3 and 4:

√4 = 2, a natural number

√3 ≈ 1.73205080756887729352744634150..., an irrational number