HCF and LCM
1. What is the HCF of 36 and 48?
A. 6
B. 12
C. 18
D. 24
B. 12
2. The LCM of 15 and 20 using prime factorization is:
A. 30
B. 60
C. 75
D. 100
B. 60
3. Riya has 24 pencils and 32 erasers. She wants to pack them into identical boxes with no leftovers. What is the maximum number of boxes she can use?
A. 4
B. 8
C. 12
D. 16
B. 8
4. The LCM of ⅓ and ¼ is:
A. 1/12
B. 1/6
C. 1
D. 12
C. 1
5. The HCF of 0.6 and 1.8 is:
A. 0.2
B. 0.6
C. 1.2
D. 1.8
B. 0.6
6. Two bells ring every 12 and 18 minutes. After how many minutes will they ring together?
A. 36
B. 54
C. 72
D. 108
A. 36
7. A gardener has 60 roses and 90 sunflowers. He wants to arrange them in identical bouquets with no flowers left. What’s the maximum number of bouquets?
A. 10
B. 15
C. 20
D. 30
D. 30
8. The LCM of 6, 8, and 12 is:
A. 12
B. 24
C. 36
D. 48
B. 24
9. What is the HCF of 56 and 98 using the division method?
A. 7
B. 14
C. 28
D. 56
B. 14
10. Three cars start together and take 10, 15, and 20 minutes to complete a lap. After how many minutes will they meet again at the starting point?
A. 30
B. 60
C. 90
D. 120
B. 60