1. Simple Interest – Calculator – Four in a Row
Competing in pairs, students should select a question on the left
and calculate an answer.
They should attempt to get four answers in a row on the answer grid
(using Xs or Os).
It may be necessary to set a time limit for students selecting questions!
Worksheets increase in difficulty and are in a variety of sizes.

2. Printing To print handouts from slides -
Select the slide from the left. Then click:
File > Print > ‘Print Current Slide’
To print multiple slides -
Click on a section title to highlight all those slides,
or press ‘Ctrl’ at the same time as selecting slides to
highlight more than one. Then click:
File > Print > ‘Print Selection’
To print double-sided handouts -
Highlight both slides before using ‘Print Selection’.
Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

3. 4 in a Row ②
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Questions
Starting
Amount
Interest
Rate
Time
£80 2%
2 Years 5%
£150 8%
3 Years
10%
£200
15%
Answer Grid 15 48 12 30 24
19.20 8 45 16
67.50
3.20 36 60
4.80 40
22.50 6 90 9
12.80 20 32

4. 4 in a Row ①
4 in a Row ①
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Questions
Questions
Starting
Amount
Interest
Rate
Time
£100 1%
2 Years 5%
£200
10%
3 Years
15%
£300
20%
Starting
Amount
Interest
Rate
Time
£100 1%
2 Years 5%
£200
10%
3 Years
15%
£300
20%
Answer Grid
Answer Grid 40 4 30 20 45 90 60
120 2 80 3 6
135 15 9
180 10 40 4 30 20 45 90 60
120 2 80 3 6
135 15 9
180 10

7. 4 in a Row ②
4 in a Row ②
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Questions
Questions
Starting
Amount
Interest
Rate
Time
£80 2%
2 Years 5%
£150 8%
3 Years
10%
£200
15%
Starting
Amount
Interest
Rate
Time
£80 2%
2 Years 5%
£150 8%
3 Years
10%
£200
15%
Answer Grid
Answer Grid 15 48 12 30 24
19.20 8 45 16
67.50
3.20 36 60
4.80 40
22.50 6 90 9
12.80 20 32 15 48 12 30 24
19.20 8 45 16
67.50
3.20 36 60
4.80 40
22.50 6 90 9
12.80 20 32

10. 4 in a Row ③
4 in a Row ③
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Simple Interest:
Choose a combination of
starting amount, interest rate & time.
Find the interest earned in the Answer Grid and mark it (X or O).
If there are duplicates, you must choose one!
The first player to get 4 in a row wins!
Questions
Questions
Starting
Amount
Interest
Rate
Time
£50 3%
2 Years
4.5%
£120 9%
5 Years
14%
£180
17.5%
Starting
Amount
Interest
Rate
Time
£50 3%
2 Years
4.5%
£120 9%
5 Years
14%
£180
17.5%
Answer Grid
Answer Grid 27
4.50
50.40
16.20
11.25
105
21.60 63
10.80
17.50
7.20 3 81
22.50
126 84 35
40.50
33.60 18
7.50 54 42 14 9
157.50
32.40
43.75 27
4.50
50.40
16.20
11.25
105
21.60 63
10.80
17.50
7.20 3 81
22.50
126 84 35
40.50
33.60 18
7.50 54 42 14 9
157.50
32.40
43.75

13. tom@goteachmaths.co.uk Questions? Comments? Suggestions?
…or have you found a mistake!?
Any feedback would be appreciated .
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