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Four dominoes arranged with four threes in the centre.
game

Domino Magic Rectangle

7 to 16

An ordinary set of dominoes can be laid out as a 7 by 4 magic rectangle in which all the spots in all the columns add to 24, while those in the rows add to 42. Try it! Now try the magic square...

Using Dice Here and There
article

Using Dice Here and There

5 to 11

Bernard's article reminds us of the richness of using dice for number, shape and probability.

Snooker
problem

Snooker

16 to 18

A player has probability 0.4 of winning a single game. What is his probability of winning a 'best of 15 games' tournament?

Twenty20
game

Twenty20

7 to 16
Fancy a game of cricket? Here is a mathematical version you can play indoors without breaking any windows.
Win or Lose?
problem

Win or Lose?

14 to 16

A gambler bets half the money in his pocket on the toss of a coin, winning an equal amount for a head and losing his money if the result is a tail. After 2n plays he has won exactly n times. Has he more money than he started with?

problem

Winning the Lottery

7 to 11

Find out about the lottery that is played in a far-away land. What is the chance of winning?

Playing Squash
article

Playing Squash

16 to 18

Playing squash involves lots of mathematics. This article explores the mathematics of a squash match and how a knowledge of probability could influence the choices you make.

The yellow NRICH logo above the words 'Early Years', on an orange background.
eyfs_activity

Shapes in the Bag

Age
3 to 5

In this task, children put their hands into a bag and describe what shape they think they can feel and why.

Secret Number
problem
Favourite

Secret Number

5 to 7

Annie and Ben are playing a game with a calculator. What was Annie's secret number?

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