Poly Plug Rectangles
Stage: 1 Challenge Level: 
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
Noah
Stage: 1 Challenge Level:
Noah saw 12 legs walk by into the Ark. How many creatures did he see?
More Numbers in the Ring
Stage: 1 Challenge Level:
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
Strike it Out
Stage: 1 and 2 Challenge Level:
Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
Dotty Six
Stage: 1 and 2 Challenge Level:
Dotty Six is a simple dice game that you can adapt in many ways.
Number Differences
Stage: 2 Challenge Level:
Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?
Exploring Wild & Wonderful Number Patterns
Stage: 2 Challenge Level:
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.
Square It
Stage: 3 and 4 Challenge Level:
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
I'm Eight
Stage: 1, 2, 3 and 4 Challenge Level:
Find a great variety of ways of asking questions which make 8.
NRICH is part of the family of activities in the Millennium Mathematics Project.