Factors, Powers And Standard Form Worksheet Page 10
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21E
Example 7
Work out
a
b
3
4
4
22
B
Work out 3 3 3 3 3 fi rst, then
a 3
4
5 3 3 3 3 3 3 3
multiply the answer by 3.
5 81
1
___
b 4
22
5
4
2
1
You can give your answer as
___
5
16
a fraction.
Exercise 10G
E
1
Work out
a
b
c
d
e
f
3
5
4
4
5
6
10
5
6
3
7
3
2
Work out
a
2
4
3 5
b
4
3
3 3
c
2
3
3 3
3
d
5
5
4 5
e
6
3
4 3
2
f
4
3
4 2
5
3
Write these numbers in order of size, starting with the smallest.
____
2
2
3 3
2
3
3
2
4
1
8
√
225
E
4
This is a famous riddle.
a
What is the answer to the riddle?
b
Use index notation to write down the total number of kittens.
2
AO
c
Work out the total number of kittens and cats.
B
5
Work out the value of
a
b
c
d
e
f
8
0
6
1
100
0
17
1
29
1
83
0
6
Write each of these as a fraction in its lowest terms.
a
4
b
3
c
7
d
2
e
2 3 8
f
3 3 6
21
22
21
22
21
22
E
7
The formula N 5 80 3 2
t
is used to calculate the number of bacteria on a microscope
slide after t hours.
a
Use this formula to work out the number of bacteria on the microscope slide after
Use this formula to work out the number of bacteria on the microscope slide after
i
2 hours
After 2 hours, t 2.
ii
6 hours.
2
AO
b
How many bacteria do you think were placed on the microscope slide at the
beginning of the experiment? Give a reason for your answer.
10.4 Indices
167
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