In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
What are the next three numbers in this sequence? Can you explain
why are they called pyramid numbers?
Three beads are threaded on a circular wire and are coloured either red or blue. Can you find all four different combinations?
Explore the different tunes you can make with these five gourds.
What are the similarities and differences between the two tunes you
Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?
Make new patterns from simple turning instructions. You can have a
go using pencil and paper or with a floor robot.
How do you know if your set of dominoes is complete?
I've made some cubes and some cubes with holes in. This challenge
invites you to explore the difference in the number of small cubes
I've used. Can you see any patterns?
Let's suppose that you are going to have a magazine which has 16
pages of A5 size. Can you find some different ways to make these
pages? Investigate the pattern for each if you number the pages.
Can you show that 1^99 + 2^99 + 3^99 + 4^99 + 5^99 is divisible by
How many different sets of numbers with at least four members can
you find in the numbers in this box?
An environment which simulates working with Cuisenaire rods.
What is the remainder when 2^2002 is divided by 7? What happens
with different powers of 2?
Square numbers can be represented on the seven-clock (representing these numbers modulo 7). This works like the days of the week.
Explain why the arithmetic sequence 1, 14, 27, 40, ... contains many terms of the form 222...2 where only the digit 2 appears.
If the numbers 5, 7 and 4 go into this function machine, what
numbers will come out?
Watch these videos to see how Phoebe, Alice and Luke chose to draw 7 squares. How would they draw 100?
Find the next number in this pattern: 3, 7, 19, 55 ...
Ben’s class were making cutting up number tracks. First they
cut them into twos and added up the numbers on each piece. What
patterns could they see?
Have a go at this 3D extension to the Pebbles problem.
Show that 8778, 10296 and 13530 are three triangular numbers and that they form a Pythagorean triple.
There are ten children in Becky's group. Can you find a set of
numbers for each of them? Are there any other sets?
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?
Your challenge is to find the longest way through the network
following this rule. You can start and finish anywhere, and with
any shape, as long as you follow the correct order.
"Tell me the next two numbers in each of these seven minor spells",
chanted the Mathemagician, "And the great spell will crumble away!"
Can you help Anna and David break the spell?
Can you find a way to identify times tables after they have been shifted up?
Investigate what happens when you add house numbers along a street
in different ways.
Investigate the successive areas of light blue in these diagrams.
What is the total area of the first two triangles as a fraction of
the original A4 rectangle? What is the total area of the first
three triangles as a fraction of the original A4 rectangle? If. . . .
In this investigation, you are challenged to make mobile phone
numbers which are easy to remember. What happens if you make a
sequence adding 2 each time?
While we were sorting some papers we found 3 strange sheets which
seemed to come from small books but there were page numbers at the
foot of each page. Did the pages come from the same book?
Powers of numbers behave in surprising ways. Take a look at some of these and try to explain why they are true.
Polygonal numbers are those that are arranged in shapes as they enlarge. Explore the polygonal numbers drawn here.
Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...
These sixteen children are standing in four lines of four, one
behind the other. They are each holding a card with a number on it.
Can you work out the missing numbers?
Choose a couple of the sequences. Try to picture how to make the next, and the next, and the next... Can you describe your reasoning?
There are lots of ideas to explore in these sequences of ordered
Explore this how this program produces the sequences it does. What
are you controlling when you change the values of the variables?
Choose any 4 whole numbers and take the difference between
consecutive numbers, ending with the difference between the first
and the last numbers. What happens when you repeat this process
over and. . . .
Three circles have a maximum of six intersections with each other.
What is the maximum number of intersections that a hundred circles
Investigate the numbers that come up on a die as you roll it in the
direction of north, south, east and west, without going over the
path it's already made.
How many different ways can I lay 10 paving slabs, each 2 foot by 1
foot, to make a path 2 foot wide and 10 foot long from my back door
into my garden, without cutting any of the paving slabs?
What would you get if you continued this sequence of fraction sums?
1/2 + 2/1 =
2/3 + 3/2 =
3/4 + 4/3 =
Take any two positive numbers. Calculate the arithmetic and geometric means. Repeat the calculations to generate a sequence of arithmetic means and geometric means. Make a note of what happens to the. . . .
Make some intricate patterns in LOGO
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.
If I use 12 green tiles to represent my lawn, how many different
ways could I arrange them? How many border tiles would I need each
In this section from a calendar, put a square box around the 1st,
2nd, 8th and 9th. Add all the pairs of numbers. What do you notice
about the answers?
Investigate these hexagons drawn from different sized equilateral
Three people chose this as a favourite problem. It is the sort of
problem that needs thinking time - but once the connection is made
it gives access to many similar ideas.