`tan 5^@` is (A) rational number (B) Irrational number (C) prime number (D) none of these

log_(4)18 is a rational number (b) an irrational number a prime number (d) none of these

Is pi a rational or an irrational numbers?

The product of any natural number and the smallest prime is an even number (b) an odd number a prime number (d) None of these

- Example 6.13(sqrt(3)+1)^(4)+(sqrt(3)1)^(4) is equal to(a) a rational number (b) a negative integer(C) an irrational number (d) None of these

The product of a rational number and an irrational number is

The number log _(2)7 is (1990,2M) an integer (b) a rational number an irrational number (d) a prime number

All the rational numbers are irrational also.