Prime and Composite Numbers Quiz - CBSE Class 5 Mathematics

Free practice quiz: Prime and Composite Numbers (CBSE Class 5 Mathematics). 18 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 5 Mathematics practice quiz has 18 multiple-choice questions on Prime and Composite Numbers, and 18 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is a prime number?

   1. 2
   2. 4
   3. 6
   4. 8
   Show answer

   Answer: A. 2

   A prime number has only two distinct positive divisors: 1 and itself. 2 is a prime number because it can only be divided by 1 and 2.

2. Is the number 9 a prime or composite number?

   1. Prime
   2. Composite
   3. Neither
   4. Both
   Show answer

   Answer: B. Composite

   9 is a composite number because it can be divided by 1, 3, and 9, making it have more than two divisors.

3. What is the sum of the first two prime numbers?

   1. 2
   2. 3
   3. 5
   4. 4
   Show answer

   Answer: C. 5

   The first two prime numbers are 2 and 3. Their sum is 5.

4. The number 49 is:

   1. Prime
   2. Composite
   3. Neither
   4. Both
   Show answer

   Answer: B. Composite

   49 is a composite number because it can be divided by 1, 7, and 49.

5. What is the smallest odd composite number?

   1. 5
   2. 7
   3. 9
   4. 11
   Show answer

   Answer: C. 9

   The smallest odd composite number is 9 because it's not prime and it has divisors 1, 3, and 9.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of these is a composite number?
2. How many prime numbers are there between 1 and 10?
3. What is the smallest prime number?
4. Is 15 a prime or composite number?
5. Which of the following numbers is NOT a composite number?
6. What is the largest composite number less than 10?
7. How many factors does the number 14 have?
8. Which of the following numbers is a prime number?
9. How many prime numbers are between 10 and 20?
10. What is a twin prime?
11. The number 1 is considered:
12. What is the product of 3 and 7?
13. If a number is divisible by exactly three distinct numbers, it must be:

More quizzes

• Comparing Numbers▶ Play
• Even and Odd Numbers▶ Play
• Factors and Multiples▶ Play
• Ordering Numbers▶ Play
• Place Value▶ Play

Browse all Numbers quizzes

More to play