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Interactive balance

Tessellation interactivity

Tangram browser
Interactive tasks and games
These primary activities and games all have interactive content, making them ideal for use on tablets, laptops or in a computer room.
Seesaw shenanigans
A group of animals has made a seesaw in the woods. How can you make the seesaw balance?

Celebrate 25 years of NRICH
To celebrate NRICH's 25th birthday, why not play this special version of our classic game, Got It? Can you devise a strategy so that you will always win?

Carroll diagrams
Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

Growing garlic
Ben and his mum are planting garlic. Can you find out how many cloves of garlic they might have had?

Matching triangles
Can you sort these triangles into three different families and explain how you did it?

One big triangle
Make one big triangle so the numbers that touch on the small triangles add to 10.

Inside triangles
How many different triangles can you draw which each have one dot in the middle?

Gathering gems
Using compass points, can you describe up to ten paths on this map so that you bring as many gems back home as possible?

Tables teaser

Repeating patterns



Two-digit targets
You have a set of the digits from 0 to 9. Can you arrange these in the five boxes to make two-digit numbers as close to the targets as possible?

Seeing squares for two

Multiplication tables - matching cards

Board block for two

Board block

Largest even

Same length trains

Poly plug rectangles
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?

Matching numbers


Matching time
Try this matching game which will help you recognise different ways of saying the same time interval.


Robot monsters
Use these head, body and leg pieces to make Robot Monsters which are different heights.

Sort the street
Sort the houses in my street into different groups. Can you do it in any other ways?

Matching numbers for two

Four triangles puzzle
Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?

Turning man

Always, sometimes or never? KS1
Are these statements relating to calculation and properties of shapes always true, sometimes true or never true?

Cuisenaire counting



Seeing squares
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.

Colouring triangles
Explore ways of colouring this set of triangles. Can you make symmetrical patterns?

Three way mix up
Jack has nine tiles. He put them together to make a square so that two tiles of the same colour were not beside each other. Can you find another way to do it?

Change around

Chain of changes
Arrange the shapes in a line so that you change either colour or shape in the next piece along. Can you find several ways to start with a blue triangle and end with a red circle?

Find the difference

Junior frogs

Flip flop - matching cards

Three ball line up
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.

Light the lights
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

Teddy Town - part two
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

Teddy Town - part three
There are sixteen teddies in Teddy Town - four red, four blue, four yellow and four green. There are also sixteen houses, four of each colour. Can you put them on the map of Teddy Town according to the rules?

Teddy Town - part four
There are twenty five teddies in Teddy Town - five red, five blue, five yellow, five green and five purple. There are also twenty five houses, five of each colour. Can you put them on the map of Teddy Town according to the rules?

Teddy Town - part five
There are thirty six teddies in Teddy Town - six red, six blue, six yellow, six green, six purple and six turquoise. There are also thirty six houses, six of each colour. Can you put them on the map of Teddy Town according to the rules?


Teddy Town
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

Ladybird box
Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.

4 dom

Two and one

Stop the clock for two


Tangram tangle
If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?

Three squares
What is the greatest number of squares you can make by overlapping three squares?

An easy way to multiply by 10?


Mathdoku

Diagonally square
Ayah conjectures that the diagonals of a square meet at right angles. Do you agree? How could you find out?

Triangle in a square


Fruity totals
In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?

Nine-pin triangles
How many different triangles can you make on a circular pegboard that has nine pegs?

First connect three


The Number Jumbler
The Number Jumbler can always work out your chosen symbol. Can you work out how?

Which scripts?
There are six numbers written in five different scripts. Can you sort out which is which?

Latin lilies


Sliding game

Less is more

Treasure hunt
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

Fractions and coins game


Four-digit targets

Factors and multiples game
A game in which players take it in turns to choose a number. Can you block your opponent?

The remainders game
Play this game and see if you can figure out the computer's chosen number.



A puzzling cube
Here are the six faces of a cube - in no particular order. Here are three views of the cube. Can you deduce where the faces are in relation to each other and record them on the net of this cube?


Coded hundred square
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

Matching fractions, decimals and percentages


Times tables shifts
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?

Seeing parallelograms
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 parallelogram.

First connect three for two
First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.

Missing multipliers

Transformations on a pegboard
How would you move the bands on the pegboard to alter these shapes?

1, 2, 3 magic square

Rod fractions

Phiddlywinks

A square of numbers

Matching fractions
Can you find different ways of showing the same fraction? Try this matching game and see.

Fractional triangles
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.


Your number is...

How long does it take?
