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WorksheetsHCF and LCM
Total questions: 11
Worksheet time: 3hrs 45mins
Name
Class
Date
1.
Find the HCF of 21 and 28
a)
3
b)
4
c)
7
d)
14
2.
What is the LCM of 4 and 12?
a)
4
b)
8
c)
12
d)
16
3.
Find the HCF of 40 and 60?
a)
10
b)
20
c)
30
d)
None of the above
4.
Find the LCM of 12 and 16...
a)
48
b)
36
c)
64
d)
96
5.
Find the HCF for 18, 36, and 81
a)
3
b)
2
c)
6
d)
9
6.
Find the missing factor.
72 = 8 x (a)
7.
Find the missing factor.
63 = 9 x (a)
8.
Which lists all the factors of 100?
a)
1, 2, 4, 5, 10, 20, 25, 50, 100
b)
1, 100
c)
1, 2, 3, 4, 5, 6, 7, 8, 25, 50, 100
d)
1, 2, 4, 5, 10
9.
A prime number
a)
has one factor
b)
has more than 2 factors
c)
has 100 factors
d)
has exactly 2 factors: 1 and the number
10.
2 x 2 x 2 is the prime factorization of
a)
6
b)
12
c)
22
d)
8
11.
Use a factor tree to find the prime factorization of 105
a)
7x5x3
b)
11x5x3
c)
7x5x2x1
d)
7x5x3x2
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