Multiplication and division

There are 227 NRICH Mathematical resources connected to Multiplication and division
It Figures
problem

It Figures

Age
7 to 11
Challenge level
filled star filled star empty star
Suppose we allow ourselves to use three numbers less than 10 and multiply them together. How many different products can you find? How do you know you've got them all?
Sometimes we lose things
problem

Sometimes we lose things

Age
7 to 11
Challenge level
filled star filled star filled star
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.
Doplication
problem

Doplication

Age
7 to 11
Challenge level
filled star empty star empty star
We can arrange dots in a similar way to the 5 on a dice and they usually sit quite well into a rectangular shape. How many altogether in this 3 by 5? What happens for other sizes?
Month Mania
problem

Month Mania

Age
5 to 11
Challenge level
filled star filled star empty star
Can you design a new shape for the twenty-eight squares and arrange the numbers in a logical way? What patterns do you notice?
Dice and Spinner Numbers
problem

Dice and Spinner Numbers

Age
7 to 11
Challenge level
filled star filled star empty star
If you had any number of ordinary dice, what are the possible ways of making their totals 6? What would the product of the dice be each time?
Sending Cards
problem

Sending Cards

Age
7 to 11
Challenge level
filled star empty star empty star
This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?
I'm Eight
problem

I'm Eight

Age
5 to 11
Challenge level
filled star empty star empty star
Find a great variety of ways of asking questions which make 8.
Pebbles
problem

Pebbles

Age
7 to 11
Challenge level
filled star filled star empty star
Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?
Exploring Wild & Wonderful Number Patterns
problem

Exploring Wild & Wonderful Number Patterns

Age
7 to 11
Challenge level
filled star empty star empty star
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.