HCF and LCM Flashcards
1
Q
What is the HCF of 25 and 60
A
5
2
Q
What is the LCM of 12 and 9
A
36
3
Q
Is 1 a prime number ? Why ?
A
No it only has one factor : 1
4
Q
What is the LCM of 15 and 25
A
75
5
Q
What is the HCF of 32 and 24.
A
8
6
Q
What are all the prime numbers below 20
A
2, 3, 5, 7, 11, 13, 17, 19
7
Q
Is 9 a prime number ? Why ?
A
No because it can be divided by 3.
8
Q
What is the LCM of 6 and 15 .
A
30
9
Q
What is the HCF of 28 and 35?
A
7
10
Q
What is the LCM of 3 and 9
A
9
11
Q
What are all the factors of 48?
A
48 : 1, 48, 2, 24, 3, 16, 4, 12, 6, 8
12
Q
What is the LCM of 6 an 8
A
24
13
Q
What is the HCF of 25 and 12
A
1
14
Q
What are the first 10 multiples of 3 :
A
3, 6, 9, 12, 15, 18, 21, 24, 27, 30
15
Q
What is the LCM of 4 and 10
A
20
