Simultaneous equations

In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?

Can you find the values at the vertices when you know the values on the edges of these multiplication arithmagons?

Use graphs to gain insights into an area and perimeter problem, or use your knowledge of area and perimeter to gain insights into the graphs...

Which is bigger, n+10 or 2n+3? Can you find a good method of answering similar questions?

When I park my car in Mathstown, there are two car parks to choose from. Can you help me to decide which one to use?

Look at the times that Harry, Christine and Betty take to pack boxes when working in pairs, to find how fast Christine can pack boxes by herself.

What does the sum of these three numbers tell us about their product?

Find out how to model a battery mathematically

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.

You are given the Lowest Common Multiples of sets of digits. Find the digits and then solve the Sudoku.