ICSE Class 6 Mathematics - HCF and LCM - Test 3 (Advanced)
1. What is the HCF of 32 and 48?
A. 8
B. 12
C. 16
2. What is the LCM of 12 and 16?
A. 48
B. 36
C. 64
3. What is the HCF of 40 and 60?
A. 10
B. 20
C. 30
4. What is the LCM of 18 and 24?
A. 48
B. 54
C. 72
5. Using prime factorization, what is the HCF of 24 and 36?
A. 12
B. 18
C. 24
6. Using prime factorization, what is the LCM of 10 and 15?
A. 15
B. 30
C. 150
7. What is the HCF of 16, 20, and 28?
A. 2
B. 8
C. 4
8. What is the LCM of 3, 4, and 6?
A. 12
B. 18
C. 24
9. What is the HCF of 9 and 20?
A. 3
B. 1
C. 9
10. What is the LCM of 11 and 13?
A. 24
B. 121
C. 143
11. Two ribbons of length 24 cm and 36 cm are cut into equal longest pieces. What is the length of each piece?
A. 12 cm
B. 6 cm
C. 18 cm
12. Two lights blink every 8 seconds and 12 seconds. After how many seconds will they blink together again?
A. 20 seconds
B. 24 seconds
C. 96 seconds
13. 36 pencils and 48 erasers are packed equally in packets. What is the maximum number of packets possible?
A. 6
B. 8
C. 12
14. Two buses leave a stop every 15 minutes and 20 minutes. After how many minutes will they leave together again?
A. 60 minutes
B. 45 minutes
C. 120 minutes
15. If the HCF of 18 and 27 is 9 and their LCM is 54, what is the difference between the LCM and HCF?
A. 36
B. 45
C. 63
16. Which statement is correct for the numbers 12 and 30?
A. HCF x LCM = 30
B. HCF x LCM = 180
C. HCF x LCM = 360
17. What is the HCF of 45 and 75?
A. 15
B. 25
C. 30
18. What is the LCM of 20 and 30?
A. 50
B. 60
C. 120
19. 42 chocolates and 56 candies are packed equally in boxes. What is the greatest number of boxes possible?
A. 7
B. 8
C. 14
20. Two machines ring after every 6 minutes and 14 minutes. After how many minutes will they ring together again?
A. 42 minutes
B. 20 minutes
C. 84 minutes