ICSE Class 6 Mathematics - HCF and LCM - Test 2 (Intermediate)
1. What is the HCF of 15 and 25?
A. 3
B. 5
C. 15
2. What is the LCM of 4 and 10?
A. 20
B. 40
C. 14
3. Which is a common factor of 21 and 28?
A. 5
B. 6
C. 7
4. Which is a common multiple of 5 and 7?
A. 25
B. 35
C. 40
5. What is the HCF of 27 and 36?
A. 9
B. 12
C. 18
6. What is the LCM of 7 and 9?
A. 16
B. 56
C. 63
7. What is the HCF of 22 and 33?
A. 3
B. 11
C. 22
8. What is the LCM of 5 and 6?
A. 30
B. 15
C. 11
9. What is the HCF of 24 and 32?
A. 4
B. 6
C. 8
10. What is the LCM of 8 and 10?
A. 20
B. 40
C. 80
11. What is the HCF of 12 and 35?
A. 1
B. 5
C. 12
12. What is the LCM of 14 and 28?
A. 14
B. 42
C. 28
13. Which pair has HCF equal to 1?
A. 9 and 18
B. 9 and 16
C. 8 and 16
14. What is the LCM of 3 and 11?
A. 33
B. 14
C. 11
15. Using prime factors, what is the HCF of 18 and 30?
A. 3
B. 5
C. 6
16. Using prime factors, what is the LCM of 6 and 15?
A. 15
B. 30
C. 45
17. 12 red pens and 18 blue pens are packed equally in packets. What is the greatest number of packets possible?
A. 6
B. 12
C. 18
18. Two bells ring every 4 minutes and 6 minutes. After how many minutes will they ring together again?
A. 10 minutes
B. 24 minutes
C. 12 minutes
19. Two ropes of length 15 m and 20 m are cut into equal longest pieces. What is the length of each piece?
A. 4 m
B. 5 m
C. 10 m
20. Two runners complete one round in 3 minutes and 5 minutes. After how many minutes will they meet at the starting point again?
A. 15 minutes
B. 8 minutes
C. 30 minutes