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

We have exactly $100$ coins. There are five different values of coins.

We have decided to buy a piece of computer software for $39.75$. We have the correct money, not a penny more, not a penny less!

Can you discover what the five different types of coins are worth and how many of each we have saved?

Some coins.