A group of children are discussing the height of a tall tree. How would you go about finding out its height?

Why does the tower look a different size in each of these pictures?

On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?

Nine squares with side lengths 1, 4, 7, 8, 9, 10, 14, 15, and 18 cm can be fitted together to form a rectangle. What are the dimensions of the rectangle?

Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?

Mathematicians are always looking for efficient methods for solving problems. How efficient can you be?

Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...

There are lots of different methods to find out what the shapes are worth - how many can you find?

In this article, Malcolm Swan describes a teaching approach designed to improve the quality of students' reasoning.

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.