26.Let G be the multiplicative group of non zero rational numbers, the order of G is A) Zero B)Finite number C)Infinite D) None of these

Zero is the smallest rational number.

The last non-zero number at the end of 20! is ?

The product of a non-zero rational number with an irrational number is always a/an

If the product of two non-zero rational numbers is 1 , then they are (a) Additive inverse of each other (b) Multiplicative inverse of each other (c) Reciprocal of each other (d) Both (b) and (c)

(log)_4 18 is a rational number (b) an irrational number (c)a prime number (d) none of these

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

State true or false: (i) Negative of an irrational number is irrational . (ii) The product of a non- zero rational number and an irrational number is a rational number.

Let * be a binary operation on Q_0 (set of non-zero rational numbers) defined by a*b=(3a b)/5 for all a , b in Q_0dot Find the identity element.

If the equation 1 +sin^2 xtheta= costheta has a non-zero solution in theta , then x must be (1) An integer (2) A rational number (3) An irrational number (4) None of these

Every counting number has an infinite number of (a )factors (b) multiplies prime factors (d) None of these