Working systematically

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

Can you use the clues to complete these 5 by 5 Mathematical Sudokus?

How many solutions can you find to this sum? Each of the different letters stands for a different number.

Take an equilateral triangle and cut it into smaller pieces. What can you do with them?

Choose some fractions and add them together. Can you get close to 1?

Which of these pocket money systems would you rather have?

Investigate how you can work out what day of the week your birthday will be on next year, and the year after...

Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...

A cinema has 100 seats. How can ticket sales make £100 for these different combinations of ticket prices?

How many different symmetrical shapes can you make by shading triangles or squares?