class 10 maths chapter 1 mcq 8e

#1. Express 98 as a product of its primes

C. 2 × 7²

D. 23 × 7

B. 2² × 7²

A. 2² × 7

#2. The sum of a rational and an irrational number is

(a) Rational

(c) Both (a) and (b)

(d) Either (a) or (b)

(b) Irrational

#3. n2 – 1 is divisible by 8, if n is

(A) an integer

(B) a natural number

(D) an even integer

(C) an odd integer greater than 1

#4. π is

D. neither rational nor irrational

A. a rational number

C. both (a) & (b)

B. an irrational number

#5. The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is

(B) 100

(D) 2520

(A) 10

#6. Every positive even integer is of the form ____ for some integer ‘q’.

A. 2q

B. 2q – 1

D. none of these

C. 2q + 1

#7. The largest number that will divide 398,436 and 542 leaving remainders 7,11 and 15 respectively is

B. 11

C. 34

D. 45

A. 17

#8. 1/√3 is -

B. An irrational number

D. None of these

C. A whole number

A. A rational number

#9. A number when divided by 61 gives 27 as quotient and 32 as remainder . find the number

(b) 1796

(a) 1967

(c) 1679

(d) 1569

#10. The smallest composite number is:

B. 2

C. 3

D. 4

A. 1