Multiplication and division

problem

Number the Sides

Age

7 to 11

Challenge level

The triangles in these sets are similar - can you work out the lengths of the sides which have question marks?
problem

Rabbits in the Pen

Age

7 to 11

Challenge level

Using the statements, can you work out how many of each type of rabbit there are in these pens?
problem

Bundles of Cubes

Age

7 to 11

Challenge level

Watch this animation. What do you notice? What happens when you try more or fewer cubes in a bundle?
game

Ducking and Dividing

Age

7 to 11

Challenge level

Your vessel, the Starship Diophantus, has become damaged in deep space. Can you use your knowledge of times tables and some lightning reflexes to survive?
problem

Napier's Bones

Age

7 to 11

Challenge level

The Scot, John Napier, invented these strips about 400 years ago to help calculate multiplication and division. Can you work out how to use Napier's bones to find the answer to these multiplications?
problem

Sometimes We Lose Things

Age

7 to 11

Challenge level

Well now, what would happen if we lost all the nines in our number system? Have a go at writing the numbers out in this way and have a look at the multiplications table.
problem

The 24 Game

Age

7 to 11

Challenge level

There are over sixty different ways of making 24 by adding, subtracting, multiplying and dividing all four numbers 4, 6, 6 and 8 (using each number only once). How many can you find?
problem

Sam's Quick Sum

Age

7 to 11

Challenge level

What is the sum of all the three digit whole numbers?
problem

ABC

Age

7 to 11

Challenge level

In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. Can you reconstruct the original multiplication?
problem

Practice Run

Age

7 to 11

Challenge level

Chandrika was practising a long distance run. Can you work out how long the race was from the information?