Can you shunt the trucks so that the Cattle truck and the Sheep truck change places and the Engine is back on the main line?
What is the smallest number of tiles needed to tile this patio? Can you investigate patios of different sizes?
What is the best way to shunt these carriages so that each train can continue its journey?
How will you go about finding all the jigsaw pieces that have one peg and one hole?
What is the smallest cuboid that you can put in this box so that you cannot fit another that's the same into it?
A 2 by 3 rectangle contains 8 squares and a 3 by 4 rectangle contains 20 squares. What size rectangle(s) contain(s) exactly 100 squares? Can you find them all?
Design an arrangement of display boards in the school hall which fits the requirements of different people.
Take a rectangle of paper and fold it in half, and half again, to make four smaller rectangles. How many different ways can you fold it up?
Can you work out how many cubes were used to make this open box? What size of open box could you make if you had 112 cubes?
Seven friends went to a fun fair with lots of scary rides. They decided to pair up for rides until each friend had ridden once with each of the others. What was the total number rides?
Using different numbers of sticks, how many different triangles are you able to make? Can you make any rules about the numbers of sticks that make the most triangles?
The Zargoes use almost the same alphabet as English. What does this birthday message say?
This task, written for the National Young Mathematicians' Award 2016, involves open-topped boxes made with interlocking cubes. Explore the number of units of paint that are needed to cover the boxes. . . .
Take 5 cubes of one colour and 2 of another colour. How many different ways can you join them if the 5 must touch the table and the 2 must not touch the table?
These activities focus on finding all possible solutions so if you work in a systematic way, you won't leave any out.
A tetromino is made up of four squares joined edge to edge. Can this tetromino, together with 15 copies of itself, be used to cover an eight by eight chessboard?
How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?
Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!
Make a pair of cubes that can be moved to show all the days of the month from the 1st to the 31st.
These activities lend themselves to systematic working in the sense that it helps if you have an ordered approach.
You cannot choose a selection of ice cream flavours that includes totally what someone has already chosen. Have a go and find all the different ways in which seven children can have ice cream.
These activities lend themselves to systematic working in the sense that it helps to have an ordered approach.
What is the smallest number of jumps needed before the white rabbits and the grey rabbits can continue along their path?
Use the clues to work out which cities Mohamed, Sheng, Tanya and Bharat live in.
This tricky challenge asks you to find ways of going across rectangles, going through exactly ten squares.
Let's say you can only use two different lengths - 2 units and 4 units. Using just these 2 lengths as the edges how many different cuboids can you make?
Only one side of a two-slice toaster is working. What is the quickest way to toast both sides of three slices of bread?
Nina must cook some pasta for 15 minutes but she only has a 7-minute sand-timer and an 11-minute sand-timer. How can she use these timers to measure exactly 15 minutes?
10 space travellers are waiting to board their spaceships. There are two rows of seats in the waiting room. Using the rules, where are they all sitting? Can you find all the possible ways?
Swap the stars with the moons, using only knights' moves (as on a chess board). What is the smallest number of moves possible?
Six friends sat around a circular table. Can you work out from the information who sat where and what their profession were?
A merchant brings four bars of gold to a jeweller. How can the jeweller use the scales just twice to identify the lighter, fake bar?
If we had 16 light bars which digital numbers could we make? How will you know you've found them all?
Sitting around a table are three girls and three boys. Use the clues to work out were each person is sitting.
How many models can you find which obey these rules?
When newspaper pages get separated at home we have to try to sort them out and get things in the correct order. How many ways can we arrange these pages so that the numbering may be different?
You have 4 red and 5 blue counters. How many ways can they be placed on a 3 by 3 grid so that all the rows columns and diagonals have an even number of red counters?
These are the faces of Will, Lil, Bill, Phil and Jill. Use the clues to work out which name goes with each face.
Can you create jigsaw pieces which are based on a square shape, with at least one peg and one hole?
These activities focus on finding all possible solutions so working in a systematic way will ensure none are left out.
Imagine you have an unlimited number of four types of triangle. How many different tetrahedra can you make?
If you have only 40 metres of fencing available, what is the maximum area of land you can fence off?
A magician took a suit of thirteen cards and held them in his hand face down. Every card he revealed had the same value as the one he had just finished spelling. How did this work?
Find a cuboid (with edges of integer values) that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?
Ana and Ross looked in a trunk in the attic. They found old cloaks and gowns, hats and masks. How many possible costumes could they make?
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
A dog is looking for a good place to bury his bone. Can you work out where he started and ended in each case? What possible routes could he have taken?
How many different symmetrical shapes can you make by shading triangles or squares?
This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.
How can you put five cereal packets together to make different shapes if you must put them face-to-face?