Prime Factors Worksheet, Lcm And Hcf
ADVERTISEMENT
1
2G
1.1 Understanding prime factors, LCM and HCF
2
Questions are targeted at the grades indicated
Guided practice worksheet
Write down all the factors of each of the following numbers.
1
Write down
the factors
a
12
b
30
......................................................................
......................................................................
in pairs.
c
36
d
40
......................................................................
......................................................................
D
Use this factor tree to write 54 as a product of its prime factors.
2
54
.....................................................................................................
6
9
.....................................................................................................
2
3
3
3
.....................................................................................................
Complete the following factor trees.
3
a
b
c
42
70
84
21
10
21
Write each of the following numbers as the product of its prime factors. How can factor trees be drawn
C
4
before working through to nd out how many factors there are?
a
24
b
40
......................................................................
......................................................................
c
50
d
72
......................................................................
......................................................................
e
100
......................................................................
Remember to draw factor trees rst.
a
Write out all the factors of
5
i
ii
4
6
......................................................................
......................................................................
iii
iv
10
16
......................................................................
......................................................................
v
20
......................................................................
Factors are numbers that go
exactly into the given number.
b
Use part
a
to help you write down the highest common factor (HCF) of
i
ii
4 and 10
6 and 16
......................................................................
......................................................................
iii
iv
4 and 20
16 and 20
......................................................................
......................................................................
v
10 and 16
......................................................................
61A
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education