The number `(log)_2 7` is (1990, 2M) an integer (b) a rational number an irrational number (d) a prime number

Is pi a rational or an irrational numbers?

3.27is (a) an integer (b) a rational number (c) a natural number (d) an irrational number

The product of a rational number and an irrational number is

All the rational numbers are irrational also.

If f(x)=cos x+cos ax is periodic function, then a must be (a)an integer (b) a rational number (c)an irrational number (d) an even number

Write a rational number and an irrational number between 1 and 2.

Insert a rational and irrational number between 2 and 3