A game to be played against the computer, or in groups. Pick a 7-digit number. A random digit is generated. What must you subract to remove the digit from your number? the first to zero wins.
Can you complete this jigsaw of the multiplication square?
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?
Here is a chance to play a version of the classic Countdown Game.
A game for 2 people that everybody knows. You can play with a
friend or online. If you play correctly you never lose!
Can you spot the similarities between this game and other games you
know? The aim is to choose 3 numbers that total 15.
Investigate the smallest number of moves it takes to turn these
mats upside-down if you can only turn exactly three at a time.
Interactive game. Set your own level of challenge, practise your table skills and beat your previous best score.
Mr McGregor has a magic potting shed. Overnight, the number of
plants in it doubles. He'd like to put the same number of plants in
each of three gardens, planting one garden each day. Can he do it?
Ahmed has some wooden planks to use for three sides of a rabbit run
against the shed. What quadrilaterals would he be able to make with
the planks of different lengths?
What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?
Start by putting one million (1 000 000) into the display of your
calculator. Can you reduce this to 7 using just the 7 key and add,
subtract, multiply, divide and equals as many times as you like?
This was a problem for our birthday website. Can you use four of these pieces to form a square? How about making a square with all five pieces?
Try to stop your opponent from being able to split the piles of counters into unequal numbers. Can you find a strategy?
A game for 2 people that can be played on line or with pens and paper. Combine your knowledege of coordinates with your skills of strategic thinking.
What are the coordinates of the coloured dots that mark out the
tangram? Try changing the position of the origin. What happens to
the coordinates now?
Starting with the number 180, take away 9 again and again, joining up the dots as you go. Watch out - don't join all the dots!
A generic circular pegboard resource.
Arrange the four number cards on the grid, according to the rules,
to make a diagonal, vertical or horizontal line.
An interactive activity for one to experiment with a tricky tessellation
How have the numbers been placed in this Carroll diagram? Which
labels would you put on each row and column?
An interactive game for 1 person. You are given a rectangle with 50 squares on it. Roll the dice to get a percentage between 2 and 100. How many squares is this? Keep going until you get 100. . . .
This article gives you a few ideas for understanding the Got It! game and how you might find a winning strategy.
A card pairing game involving knowledge of simple ratio.
Imagine a wheel with different markings painted on it at regular
intervals. Can you predict the colour of the 18th mark? The 100th
Choose 13 spots on the grid. Can you work out the scoring system? What is the maximum possible score?
Use the interactivities to complete these Venn diagrams.
If you have only four weights, where could you place them in order
to balance this equaliser?
These interactive dominoes can be dragged around the screen.
The idea of this game is to add or subtract the two numbers on the dice and cover the result on the grid, trying to get a line of three. Are there some numbers that are good to aim for?
Our 2008 Advent Calendar has a 'Making Maths' activity for every
day in the run-up to Christmas.
Can you put the numbers from 1 to 15 on the circles so that no
consecutive numbers lie anywhere along a continuous straight line?
NRICH December 2006 advent calendar - a new tangram for each day in
the run-up to Christmas.
A game for 1 person to play on screen. Practise your number bonds
whilst improving your memory
Using angular.js to bind inputs to outputs
A train building game for 2 players.
Choose a symbol to put into the number sentence.
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
A game for 2 players. Can be played online. One player has 1 red
counter, the other has 4 blue. The red counter needs to reach the
other side, and the blue needs to trap the red.
Each light in this interactivity turns on according to a rule. What
happens when you enter different numbers? Can you find the smallest
number that lights up all four lights?
Try this interactive strategy game for 2
Can you make a cycle of pairs that add to make a square number
using all the numbers in the box below, once and once only?
Use the Cuisenaire rods environment to investigate ratio. Can you
find pairs of rods in the ratio 3:2? How about 9:6?
A game for 1 or 2 people. Use the interactive version, or play with friends. Try to round up as many counters as possible.
Use the interactivity to investigate what kinds of triangles can be
drawn on peg boards with different numbers of pegs.
Start with any number of counters in any number of piles. 2 players
take it in turns to remove any number of counters from a single
pile. The winner is the player to take the last counter.
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.
A game for 1 person. Can you work out how the dice must be rolled from the start position to the finish? Play on line.
Slide the pieces to move Khun Phaen past all the guards into the position on the right from which he can escape to freedom.
Try out the lottery that is played in a far-away land. What is the
chance of winning?