Factors, Powers And Standard Form Worksheet Page 12
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21Example 8
C
Write each number as a product of prime factors using index notation.
a
b
50
1960
You could also use
a
50
repeated division.
2
50
2
25
5
25
5
5
5
5
1
50 5 2 3 5 3 5
5 2 3 5
2
You could also use
b
1960
repeated division.
2
1960
10
196
2
980
2
490
2
5
14
14
5
245
7
49
2
7
2
7
7
7
1960 5 2 3 2 3 2 3 5 3 7 3 7
1
5 2
3
3 5 3 7
2
Exercise 10H
C
84
1
a
Copy and complete this factor tree.
b
Write 84 as a product of prime factors
42
using index notation.
6
2
Write each number as a product of prime factors using index notation.
a
20
b
63
c
64
d
45
e
110
f
81
3
Write each number as a product of prime factors using index notation.
a
156
b
1980
c
7700
d
608
e
2025
f
980
C
4
a
Copy and complete these two factor trees for 100.
100
100
10
10
2
50
b
Jamie says that the prime factors will be different depending on
which factor pair you choose fi rst.
2
AO
Do you agree with him?
Demonstrate your answer using another number.
10.5 Prime factors
169
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