Katie had a pack of 20 cards numbered from 1 to 20. She arranged
the cards into 6 unequal piles where each pile added to the same
total. What was the total and how could this be done?
There are 44 people coming to a dinner party. There are 15 square
tables that seat 4 people. Find a way to seat the 44 people using
all 15 tables, with no empty places.
There are 78 prisoners in a square cell block of twelve cells. The
clever prison warder arranged them so there were 25 along each wall
of the prison block. How did he do it?
There were chews for 2p, mini eggs for 3p, Chocko bars for 5p and
lollypops for 7p in the sweet shop. What could each of the children
buy with their money?
Using the statements, can you work out how many of each type of
rabbit there are in these pens?
In this problem it is not the squares that jump, you do the jumping! The idea is to go round the track in as few jumps as possible.
Kate has eight multilink cubes. She has two red ones, two yellow, two green and two blue. She wants to fit them together to make a cube so that each colour shows on each face just once.
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.
Using the numbers 1, 2, 3, 4 and 5 once and only once, and the
operations x and ÷ once and only once, what is the smallest
whole number you can make?
All the girls would like a puzzle each for Christmas and all the
boys would like a book each. Solve the riddle to find out how many
puzzles and books Santa left.
Place the digits 1 to 9 into the circles so that each side of the
triangle adds to the same total.
Fill in the numbers to make the sum of each row, column and
diagonal equal to 34. For an extra challenge try the huge American
Flag magic square.
Amy's mum had given her £2.50 to spend. She bought four times as many pens as pencils and was given 40p change. How many of each did she buy?
There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. Can you use the information given to find out how many eggs are in each basket?
Can you use the information to find out which cards I have used?
Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?
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?
The discs for this game are kept in a flat square box with a square
hole for each disc. Use the information to find out how many discs
of each colour there are in the box.
Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.
Place the numbers 1 to 6 in the circles so that each number is the
difference between the two numbers just below it.
There were 22 legs creeping across the web. How many flies? How many spiders?
Fill in the missing numbers so that adding each pair of corner
numbers gives you the number between them (in the box).
The clockmaker's wife cut up his birthday cake to look like a clock
face. Can you work out who received each piece?
Can you arrange fifteen dominoes so that all the touching domino
pieces add to 6 and the ends join up? Can you make all the joins
add to 7?
Woof is a big dog. Yap is a little dog.
Emma has 16 dog biscuits to give to the two dogs.
She gave Woof 4 more biscuits than Yap.
How many biscuits did each dog get?
Sam sets up displays of cat food in his shop in triangular stacks.
If Felix buys some, then how can Sam arrange the remaining cans in
Place the numbers 1 to 10 in the circles so that each number is the
difference between the two numbers just below it.
On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?
Pat counts her sweets in different groups and both times she has
some left over. How many sweets could she have had?
As you come down the ladders of the Tall Tower you collect useful spells. Which way should you go to collect the most spells?
Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
Can you find a path from a number at the top of this network to the
bottom which goes through each number from 1 to 9 once and once
Make one big triangle so the numbers that touch on the small triangles add to 10. You could use the interactivity to help you.
Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?
Peter, Melanie, Amil and Jack received a total of 38 chocolate
eggs. Use the information to work out how many eggs each person
Rocco ran in a 200 m race for his class. Use the information to
find out how many runners there were in the race and what Rocco's
finishing position was.
Can you draw a continuous line through 16 numbers on this grid so
that the total of the numbers you pass through is as high as
In this problem you have to place four by four magic squares on the
faces of a cube so that along each edge of the cube the numbers
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
A shunting puzzle for 1 person. Swop the positions of the counters at the top and bottom of the board.
Use the information about Sally and her brother to find out how many children there are in the Brown family.
Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?
Find at least one way to put in some operation signs (+ - x ÷)
to make these digits come to 100.
Find another number that is one short of a square number and when
you double it and add 1, the result is also a square number.
Strike it Out game for an adult and child. Can you stop your partner from being able to go?
There are three buckets each of which holds a maximum of 5 litres.
Use the clues to work out how much liquid there is in each bucket.
Can you go from A to Z right through the alphabet in the hexagonal
Put the numbers 1, 2, 3, 4, 5, 6 into the squares so that the
numbers on each circle add up to the same amount. Can you find the
rule for giving another set of six numbers?
Skippy and Anna are locked in a room in a large castle. The key to that room, and all the other rooms, is a number. The numbers are locked away in a problem. Can you help them to get out?
Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.