Number Lines
Age 5 to 7
Challenge Level
A resource to try once children are familiar with number lines, and they have begun to use them for addition. It could be a good way to talk about subtraction. Leah and Tom each have a number line. Can you work out where their counters will land?
What Was in the Box?
Age 5 to 7
Challenge Level
This big box adds something to any number that goes into it. If you know the numbers that come out, what addition might be going on in the box?
Secret Number
Age 5 to 7
Challenge Level
Annie and Ben are playing a game with a calculator. What was Annie's secret number?
The Tall Tower
Age 5 to 7
Challenge Level
As you come down the ladders of the Tall Tower you collect useful spells. Which way should you go to collect the most spells?
Stop the Clock
Age 5 to 7
Challenge Level
This is a game for two players. Can you find out how to be the first to get to 12 o'clock?
Growing Garlic
Age 5 to 11
Challenge Level
Ben and his mum are planting garlic. Can you find out how many cloves of garlic they might have had?
Doing and Undoing
Age 5 to 11
Challenge Level
An investigation looking at doing and undoing mathematical operations focusing on doubling, halving, adding and subtracting.
Junior Frogs
Age 5 to 11
Challenge Level
Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?
Nim-7
Age 5 to 14
Challenge Level
Can you work out how to win this game of Nim? Does it matter if you go first or second?
NRICH is part of the family of activities in the Millennium Mathematics Project.