Class 6 Maths Chapter 5: Prime Time Important Questions by PW
Mishika Gupta11 Sept, 2026
Prime numbers and factors form an important part of number-based calculations, but questions can become confusing when you need to distinguish prime and composite numbers, find common factors, apply divisibility rules, or complete a prime factorisation. Problems involving HCF and coprime numbers also require you to apply the right method carefully.
The Class 6 Maths Chapter 5 Important Questions provide practice across the main concepts of Prime Time. You will work with prime and composite numbers, factors, multiples, HCF, divisibility, prime factorisation, and coprime numbers through different question formats. Solving these questions can help you check your understanding, improve calculation accuracy, and identify topics that need more practice.
Class 6 Maths Chapter 5 Important Questions
Use these Class 6 Maths Chapter 5 Important Questions to revise Prime Time and practise concepts such as factors, multiples, prime numbers, divisibility, HCF, and prime factorisation.
Important Questions with Answers
Q1. Which of the following statements is true?
(A) All prime numbers are even
(B) The number 1 is a prime number.
(C) All composite numbers are greater than 1.
(D) The number 2 is a composite number.
Answer: (C) All composite numbers are greater than 1.
Q2. Which of the following numbers is the product of exactly three distinct prime numbers?
(A) 20
(B) 165
(C) 45
(D) 147
Answer: (B) 165
Q3. Find the HCF of 16 and 40.
(A) 8
(B) 4
(C) 2
(D) 16
Answer: (A) 8
Q4. A ______ of a number is an exact divisor of that number.
(A) Multiple
(B) Factor
(C) Dividend
(D) None of these
Answer: (B) Factor
Q5. How many three-digit prime numbers can be formed using each of the digits 1, 3, and 7 exactly once?
(A) 1
(B) 2
(C) 3
(D) 4
Answer: (C) 3
Q6. Assertion (A): The number 1 is considered a prime number.
Reason (R): A prime number must have exactly two distinct factors.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.
Answer: (D) (A) is false but (R) is true.
Q7. Fill in the blanks:
(i) A number is divisible by 10 if it ends with the digit ______.
(ii) The smallest 3-digit number that is divisible by both 2 and 5 is ______.
(A) 0 and 100
(B) 5 and 100
(C) 0 and 10
(D) 0 and 1000
Answer: (A) 0 and 100
Q8. True or False:
(i) The number 1 is neither a prime number nor a composite number.
(ii) The number 0 is a prime number.
(A) True and False
(B) True and True
(C) False and False
(D) False and True
Answer: (A) True and False
Q9. Find the factors of 27.
(A) 3, 9 and 27
(B) 1, 3, 4, 9 and 27
(C) 1, 3, 9 and 27
(D) 1, 2, 3, 9 and 27
Answer: (C) 1, 3, 9 and 27
Q10. Which of the following statements is true?
(A) Consecutive numbers are always coprime.
(B) 4, 6, 7, 8 and 9 are composite numbers.
(C) 12 is a prime number.
(D) The sum of primes cannot be a prime.
Answer: (A) Consecutive numbers are always coprime.
Q11. Test the divisibility of the following numbers by 8:
(i) 9364
(ii) 2138
(A) Divisible and Not divisible
(B) Not divisible and Not divisible
(C) Divisible and Divisible
(D) Not divisible and Divisible
Answer: (B) Not divisible and Not divisible
Q12. What is the smallest number divisible by 4, 5, and 6?
(A) 20
(B) 30
(C) 60
(D) 120
Answer: (C) 60
Class 6 Maths Chapter 5 Important Questions PDF
Once you have revised the chapter, use the Class 6 Maths Chapter 5 Important Questions PDF to practise additional problems based on prime numbers, factors, multiples, divisibility, HCF, and prime factorisation. Check your answers after completing the questions and revisit the concepts where you make mistakes.
Class 6 Maths Chapter 5 Important Questions PDF
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What Can You Revise with PW Class 6 Maths Chapter 5 Important Questions?
The Class 6 Maths Chapter 5 Important Questions cover the main concepts of Prime Time through different question formats. They can help you revisit important number properties, apply the right rules, and check your understanding of the chapter.
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Identify Prime and Composite Numbers: Distinguish between prime and composite numbers using their factors.
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Understand Factors and Multiples: Work with factors, multiples, and their properties.
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Use Divisibility Rules: Apply divisibility rules to determine whether numbers are divisible by 2, 5, 8, 10, and other numbers.
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Find HCF: Solve questions involving the highest common factor of two or more numbers.
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Use Prime Factorisation: Break numbers into their prime factors and identify incomplete factorisations.
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Recognise Coprime Numbers: Identify pairs of numbers that have only 1 as their common factor.
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Attempt Different Question Formats: Solve MCQs, assertion-reasoning questions, fill-in-the-blanks, and true-or-false questions.
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Check Your Calculations: Review your answers and identify mistakes in factors, multiples, divisibility, and factorisation.
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Revise Before Exams: Revisit the chapter before class tests, unit tests, and school examinations.
Prime Time brings together several important ideas about numbers, from factors and multiples to HCF and prime factorisation. Revisiting these concepts through the Class 6 Maths Chapter 5 Important Questions can help you check your understanding and become more confident with number-based questions.
Related Resources
Class 6 Maths Chapter 5 Important Questions FAQs
What is Chapter 5 of Class 6 Maths about?
What is a prime number?
Is 1 a prime or composite number?
How can important questions help with exam preparation?
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