Q. Which of the following is/are always true? (a) Every irrational number is a surd. (b) Any surd of the form `nsqrt a+nsqrt b` can be rationalised by a surd of the form `(nsqrt a-nsqrt b)` a where `nsqrt a` and `nsqrt b` a are surds. (c) Both (a) and (b) (d) Neither (a) nor (b)

The silkworm is (a) a caterpillar (b) a larva (c) both (a) and (b) (d) Neither (a) nor (b) Choose the correct option.

a a n d b are two co-primes. Which of the following is/are true? LCM (a , b)= a x b (b) HCF (a , b)=1 Both (a)a n d (b) (d) Neither (a) nor (b)

The equivalent weight of Na_(2) HPO_(4) can be a. M//2 as base b. M//1 as acid c. Both (a) and (b) d. Neither (a) and (b)

The equivalent weight of Na_(2) HPO_(4) can be a. M//2 as base b. M//1 as acid c. Both (a) and (b) d. Neither (a) and (b)

a\ a n d\ b are two co-primes. Which of the following is/are true? (a) LCM (a ,\ b)=\ a\*\ b (b) HCF (a ,\ b)=1 (c) Both (a)a n d\ (b) (d) Neither (a)\ n o r \ (b)

If sqrt(a)=sqrt(b)+sqrt(c) and sqrt(a),sqrt(b)) and sqrt(c) are there surds,then

Which of the following is a correct statement? (A)Sum of two irrational numbers is always irrational (B) Sum of a rational and irrational number is always an irrational number (C)Square of an irrational number is always an irrational number (D) Sum of two rational numbers can never be an integer

Which of the following statements are true (T) and which are false (F)? If a, b, c are any three whole numbers then a + (b + c) = (b + a) + c.

Which of the following surds are similar ? (a)2sqrt(5) " "(b)3root(3)(5)" "(c)4sqrt(5)" "5root(4)(5)