You may also like

problem icon

Oh for the Mathematics of Yesteryear

A garrison of 600 men has just enough bread ... but, with the news that the enemy was planning an attack... How many ounces of bread a day must each man in the garrison be allowed, to hold out 45 days against the siege of the enemy?

problem icon

Tree Tops

A manager of a forestry company has to decide which trees to plant. What strategy for planting and felling would you recommend to the manager in order to maximise the profit?

problem icon

History of Money

If you would like a new CD you would probably go into a shop and buy one using coins or notes. (You might need to do a bit of saving first!) However, this way of paying for the things you want did not always exist. Find out more ...

Thirty Nine, Seventy Five

Stage: 3 Challenge Level: Challenge Level:1

Thank you for working out the money in our birthday present pot! We have had lots of suggestions from St Aldhelms School. Can they all be right?

Matthew:

20 * £1.00 = £20.00
20 * 50p = £10.00
44 * 20p = £8.80
3 * 10p = 30p
13 * 5p = 65p
Total   £39.75

Justin:

7 * £1.00 = £7.00
48 * 50p = £24.00
43 * 20p = £8.60
1 * 10p = £0.10
1 * 5p = £0.05
Total   £39.75

Emma:

10 * £1.00 = £10.00
50 * 50p = £25.00
10 * 20p = £2.00
25 * 10p = £2.50
5 * 5p = 25p
Total   £39.75

When you pay for things in shops you can give the money in lots of different ways but in this case you had a set number of coins, 100. are you surprised by the different answers?