# 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**