Primary 4 Mathematics · Chapter 2 · Practice sheet

Lesson 2.3: Common Factors

Name:Date:Marks: / 15

Section A · Multiple choice 4 marks

1. Which of these is a common factor of 12 and 18?1 mark

(A) 4(B) 9(C) 6(D) 36

2. What is the greatest common factor of 16 and 24?1 mark

(A) 4(B) 2(C) 48(D) 8

3. The Venn diagram shows the factors of 18 and the factors of 24. What is the greatest common factor of 18 and 24?1 mark

(A) 6(B) 3(C) 9(D) 12

4. Which pair of numbers has a greatest common factor of 1?1 mark

(A) 6 and 9(B) 8 and 15(C) 10 and 15(D) 12 and 18

Section B · Write your answer 11 marks

5. List all the common factors of 12 and 30.1 mark

6. Find the greatest common factor of 36 and 48.1 mark

7. What is the greatest common factor of 9 and 28?1 mark

8. The Venn diagram shows the factors of 20 and the factors of 30. What is the greatest common factor of 20 and 30?1 mark

9. I am a common factor of 48 and 72. I am greater than 8 and less than 24. What number am I?1 mark

10. Mei has 24 pens and 36 pencils. She wants to make identical gift sets using all of them, with nothing left over. What is the greatest number of gift sets she can make?2 marks

11. Ali has two ribbons, 42 cm long and 56 cm long. He cuts both into pieces of the same length with none left over. What is the greatest possible length of each piece? How many pieces does he get altogether?2 marks

12. A rectangular board is 48 cm long and 36 cm wide. Priya covers it completely with identical square tiles, with no gaps. What is the side of the largest possible tile? How many tiles does she use?2 marks

Shukr Learns · free practice for parents and children · original questions, not affiliated with any school or agency