Plants
Age 5 to 14
Challenge Level
Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?
Shape Times Shape
Age 7 to 11
Challenge Level
These eleven shapes each stand for a different number. Can you use the number sentences to work out what they are?
The Deca Tree
Age 7 to 11
Challenge Level
Find out what a Deca Tree is and then work out how many leaves there will be after the woodcutter has cut off a trunk, a branch, a twig and a leaf.
Maze 100
Age 7 to 11
Challenge Level
Can you go through this maze so that the numbers you pass add to exactly 100?
The Dice Train
Age 7 to 11
Challenge Level
This dice train has been made using specific rules. How many different trains can you make?
Spiralling Decimals
Age 7 to 14
Challenge Level
Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?
Factor Lines
Age 7 to 14
Challenge Level
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
More Children and Plants
Age 7 to 14
Challenge Level
This challenge extends the Plants investigation so now four or more children are involved.
Factors and Multiples Game
Age 7 to 16
Challenge Level
A game in which players take it in turns to choose a number. Can you block your opponent?
Two and Two
Age 11 to 16
Challenge Level
How many solutions can you find to this sum? Each of the different letters stands for a different number.
NRICH is part of the family of activities in the Millennium Mathematics Project.