ICSE Class 6 Mathematics - HCF and LCM - Test 4 (Expert)
1. What is the HCF of 72 and 96?
A. 12
B. 24
C. 36
2. What is the LCM of 14 and 35?
A. 49
B. 140
C. 70
3. Using prime factorization, what is the HCF of 54 and 90?
A. 18
B. 27
C. 45
4. Using prime factorization, what is the LCM of 16 and 28?
A. 56
B. 112
C. 224
5. What is the HCF of 30, 45, and 60?
A. 10
B. 30
C. 15
6. What is the LCM of 4, 9, and 12?
A. 36
B. 48
C. 72
7. What is the HCF of 25 and 36?
A. 5
B. 1
C. 9
8. What is the LCM of 17 and 19?
A. 36
B. 289
C. 323
9. Two strings of lengths 42 cm and 70 cm are cut into equal longest pieces. What is the length of each piece?
A. 14 cm
B. 21 cm
C. 28 cm
10. Two alarms ring every 16 minutes and 24 minutes. After how many minutes will they ring together again?
A. 40 minutes
B. 48 minutes
C. 96 minutes
11. 63 notebooks and 84 pencils are packed equally in gift sets. What is the maximum number of gift sets possible?
A. 7
B. 14
C. 21
12. What is the least number of pages that can be arranged equally in bundles of 18 or 30?
A. 90
B. 120
C. 180
13. If the HCF of two numbers is 8 and their LCM is 72, what is the product of the two numbers?
A. 560
B. 576
C. 640
14. If the HCF of two numbers is 9 and their LCM is 108, what is their product?
A. 900
B. 963
C. 972
15. What is the HCF of 56 and 84?
A. 28
B. 14
C. 21
16. What is the LCM of 21 and 27?
A. 126
B. 189
C. 243
17. 72 boys and 108 girls are arranged in equal rows. What is the maximum number of rows possible?
A. 18
B. 27
C. 36
18. Two buses arrive at a stop every 18 minutes and 27 minutes. After how many minutes will they arrive together again?
A. 54 minutes
B. 45 minutes
C. 72 minutes
19. What is the HCF of 72 and 120?
A. 12
B. 24
C. 36
20. What is the LCM of 24 and 40?
A. 80
B. 100
C. 120