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IGCSE Class 8  >  Class 8 Test  >  Year 8 Mathematics (Cambridge)  >  Test: Factors, multiples, and primes - Class 8 MCQ

Factors, multiples, and primes - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: Factors, multiples, and primes (10 Questions)

You can prepare effectively for Class 8 Year 8 Mathematics IGCSE (Cambridge) with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Factors, multiples, and primes". These 10 questions have been designed by the experts with the latest curriculum of Class 8 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 10

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Test: Factors, multiples, and primes - Question 1
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Which of these is not a factor of 80?

Detailed Solution: Question 1

80 ÷ 3 = 26.666, which is not a whole number, so 3 is not a factor of 80.

Test: Factors, multiples, and primes - Question 2
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What do you call a number that divides exactly into two or more given numbers?

Detailed Solution: Question 2

A common divisor of two or more numbers is a number that divides each of them exactly, so it is called a common divisor.

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Test: Factors, multiples, and primes - Question 3
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Which of these sets of numbers are all factors of 80?

Detailed Solution: Question 3

Option A (2, 4, 8, 16) contains all factors of 80, as 80 ÷ 2 = 40, 80 ÷ 4 = 20, 80 ÷ 8 = 10, and 80 ÷ 16 = 5. Option B includes 12 (80 ÷ 12 = 6.666), Option C includes 18 (80 ÷ 18 = 4.444), and Option D includes 14 (80 ÷ 14 = 5.714), which are not whole numbers.

Test: Factors, multiples, and primes - Question 4
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Which of these is a factor of 66?

Detailed Solution: Question 4

66 ÷ 3 = 22, a whole number, so 3 is a factor. However, 66 ÷ 4 = 16.5, 66 ÷ 8 = 8.25, and 66 ÷ 12 = 5.5, which are not whole numbers, so 4, 8, and 12 are not factors.

Test: Factors, multiples, and primes - Question 5
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Which of the following is a factor pair of 32?

Detailed Solution: Question 5

A factor pair of 32 is two numbers whose product is 32.
For option B: 2 × 16 = 32, which is correct.
Option A: 2 × 14 = 28
Option C: 2 × 18 = 36
Option D: 2 × 20 = 40

Test: Factors, multiples, and primes - Question 6
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Is 4 a factor of 21?

Detailed Solution: Question 6

If you divide 4 into 21 the answer is 5.25. Because the answer is NOT a whole number, 4 is NOT a factor of 21.

Test: Factors, multiples, and primes - Question 7
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Which of the following numbers is a prime number?

Detailed Solution: Question 7

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself. 23 fits this definition as it can only be divided evenly by 1 and 23.

Test: Factors, multiples, and primes - Question 8
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Which of these is a factor of 33?

Detailed Solution: Question 8

33 ÷ 11 = 3, a whole number, so 11 is a factor. However, 33 ÷ 7 = 4.714, 33 ÷ 9 = 3.666, and 33 ÷ 13 = 2.538, which are not whole numbers, so 7, 9, and 13 are not factors.

Test: Factors, multiples, and primes - Question 9
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What is the perimeter of a rectangle with length 12 cm and breadth 7 cm?

Detailed Solution: Question 9

The perimeter of a rectangle is 2 × (length + breadth). Here length + breadth = 12 cm + 7 cm = 19 cm, so perimeter = 2 × 19 cm = 38 cm.

Test: Factors, multiples, and primes - Question 10
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Which of the following numbers is NOT a multiple of 9?

Detailed Solution: Question 10

48 is not completely divided by 9 and leaves a remainder of 3. Thus, 48 is not a multiple of 9

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About this Class 8 Practice Test

This test contains 10 MCQs on Factors, multiples, and primes with detailed solutions for each question. It is part of the Year 8 Mathematics IGCSE (Cambridge) course on EduRev, designed to align with the current Class 8 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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If you found this Factors, multiples, and primes MCQ Test helpful, you can further enhance your Class 8 preparation with in-depth courses on EduRev, for all the subjects and topics available in Year 8 Mathematics IGCSE (Cambridge) course. The course offers:
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  • MCQ Test: variety of questions as per the pattern of Class 8 exam
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