Real Numbers – Class 10/ MCQ

CBSE CLASS 10 MATHEMATICS
Real Numbers – Chapter 1/ MCQ
Multiple Choice Questions.

Choose the correct answer from the options given below:

1. The prime factorisation of a natural number is ———— except for the order of its factors.
A. Different
B. Unique
C. Twice
2. How many prime factors are there in the prime factorisation of 10626?
A. 4
B. 5
C. 6
3. Which of the following is an irrational number?
A. 0.666
B. 3/8
C. Pi
4. Which of the following rational numbers have a terminating expansion?
A. 13/3125
B. 64/455
C.29/343
5. HCF of 6, 72 and 120 is ——————-
A. 4
B. 6
C. 8
6. 14588/625 will have ———–
A. Non terminating decimal expansion
B. Terminating decimal expansion
C. Non terminating non repeating decimal expansion
7. The cube of any positive integer is of the form ———-
A. 9m, 9m+1 or 9m+8
B. 9m -1, 9m or 9m+1
C. 9m, 9m +2 or 9m+ 5
8. The product of three consecutive positive integers is divisible by ———–
A. 4
B. 6
C. 8
9. Every composite number can be written as the product of powers of ————–
A. Composite numbers
B. Prime numbers
C. Odd numbers
10. Express 253 as a product of its primes.
A. 3 X 7 X 11
B. 5 X 3 X 7
C. 11 X 23

ANSWERS:

1. Unique

2. 5

3. Pi

4. 13/3125

5. 6

6. Terminating Decimal Expansion

7. 9m, 9m+1 or 9m+8

8. 6

9. Prime

10. 11 X 23