Transum Software

Flowchart Bills - Selling Textbooks

Calculate bill totals by following the instructions given in the form of a flow chart.

Level 1 Level 2 Level 3 Description Investigation More Money Maths

This is level 1; Selling Textbooks You can earn a trophy if you get at least 7 correct.

You have started a new job preparing bills and the boss has sketched this flow chart to show how the totals are arrived at. Calculate the cost of the items on the right:

Flowchart Flowchart Flowchart

9 books

£ Correct Wrong

16 books

£ Correct Wrong

3 books

£ Correct Wrong

34 books

£ Correct Wrong

1 book

£ Correct Wrong

12 books

£ Correct Wrong

36 books

£ Correct Wrong

5 books

£ Correct Wrong

10 books

£ Correct Wrong

20 books

£ Correct Wrong


This is level 1. You can also try:
Level 2 Level 3


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Description of Levels



Level 1 - Selling Textbooks

The more textbooks a customer buys the cheaper the unit price. The task at this level is to calculate the cost of buying different numbers of textbooks using the flow chart for guidance.

Level 2 - Selling Eggs

Similarly buying eggs in bulk is cheaper (per egg) than buying a smaller number of eggs. Traditionally eggs have been sold by the dozen. A dozen is 12.

Level 3 - Calculating Gas Bills

Paying for gas and electricity usually includes a standing charge and a staged set of charges per unit. The amount of gas is measured in therms.


Try many different starting numbers in the given flowchart. Which starting numbers reach one the fastest? Why?

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