A challenge to find the number which when written as a word has all the letters in alphabetical order.

This lesson starter requires pupils to find the missing numbers in this partly completed arithmagon puzzle.

Can you use the digits on the left of this clock along with any mathematical operations to equal the digits on the right?

Rearrange the letters in the ex

The missing square puzzle is an optical illusion used to help students reason about geometrical figures.

How many ways can you write an expression for 100 which only uses the same digit repeated and any operations?

Go around the roundabout performing each of the operations. Which starting point gives the largest answer?

Work out the cheapest way from Los Angeles to Las Vegas by choosing the best route and adding up the given numbers.

Can you draw 4 straight lines, without taking your pencil off the paper, which pass through all 9 roses?

Can you find a 14 digit number containing two each of the digits one to seven which obeys the rules given?

Interactive number-based logic puzzle similar to those featuring in The Times and Telegraph newspapers.

Each traffic sign stands for a number. Some of the sums of rows and columns are shown. What numbers might the signs stand for?

Arrange the numbers from 1 to 14 in the spaces to make the sums correct. How fast can you do it?

Use your knowledge of rectangle areas to calculate the missing measurement of these composite diagrams.

Divide the grid into rectangular pieces so that the area of each piece is the same as the number it contains.

An extensive collection of Arithmagons arranged in levels according to their features. Find the missing numbers in these online, self-checking exercises and discover the wonders of Arithmagons.

A puzzle requiring the arrangement of numbers on the function machines to link the given input numbers to the correct output.

Turn your calculator upside down to make words out of the answers to these questions.

Can you get your car out of the very crowded car park by moving other cars forwards or backwards?

Crack the code by replacing the encrypted letters in the given text. There are lots of hints provided about code breaking techniques.

Fill in the squares according to the clues given by the string of numbers for each row and column.

Arrange the digits one to nine to make a number which is divisible in the way described.

Arrange the digits one to nine on the spaces provided to make two division calculations containing multiples of three.

Arrange the dominoes in seven squares. The number of dots along each side of the square must be equal to the number in the middle

Arrange the digits to make three 3 digit numbers such that the second is double the first and the third is three times the first.

Investigate the number of rectangles on a grid of squares. What strategies will be useful in coming up with the answer?

A drag and drop activity challenging you to arrange the digits to produce the largest possible product.

Arrange the given digits to make a Latin square with the given row and column calculation results.

Arrange the given numbers on the cross so that the sum of the numbers in both diagonals is the same.

Find all of the possible ways of making the magic total from the numbers in this four by four magic square.

An interactive mathematical crossword for you to do online. Find the missing words from the given clues.

Arrange the given digits to make three numbers such that the third is the product of the first and the second.

Arrange the given digits to make three numbers such that two of them add up to the third.

Find which numbers in a given list do not combine with other numbers on the list to make a given sum.

The students numbered 1 to 8 should sit on the chairs so that no two consecutively numbered students sit next to each other.

Interactive, randomly-generated, number-based logic puzzle designed to develop numeracy skills.

Place the digits one to nine in each of the regions created by the Olympic rings so that the sum of the numbers in each ring is the same.

Solve the problem of getting four people through a tunnel with one torch in the minimum amount of time.

Let the psychic read the cards and magically reveal the number you have secretly chosen. What is the mathematics that makes this trick work?

Toss the pancakes until they are neatly stacked in order of size. Find how to do this using the smallest number of moves.

A great puzzle requiring you to use all of the cards to create a continuous red line from start to finish.

An interactive activity challenging you to reproduce a pattern of coloured squares according to given clues.

Find the five numbers which when added or multiplied together in pairs to produce the given sums or products.

If you were to pick up the sticks from this pile so that you were always removing the top stick what calculation would you create?

Drag the numbers into the red cells so that the sum of the three numbers in each row and each column is a prime number.

Numbers in the bricks are found by adding the two bricks immediately below together. Can you achieve the given target?

Calculate the areas of all the possible quadrilaterals that can be constructed by joining together dots on this grid.

The traditional River Crossing challenge. Can you do it in the smallest number of moves?

This is quite a challenging number grouping puzzle requiring a knowledge of prime, square and triangular numbers.

Place the nine numbers in the table so they obey the row and column headings about the properties of the numbers.

Arrange the scallywags and scoundrels on the chairs so that the numbers of any two sitting next to each other add up to a prime number.

Make a schedule for the 24-hour Darts Marathon which will take into account everyone's requests and keep everyone happy.

Arrange a rota for the Scouts to travel in boats so that they are with different people each day.

Can you find a 6 digit number containing two each of the digits one to three which obeys the rules given?

Move the trams to their indicated parking places in the shunting yard as quickly as possible.

Arrange the numbers on the squares so that the totals along each line of three squares are equal.

Use the pieces of the T puzzle to fit into the outlines provided. A drag, rotate and drop interactive challenge.

Use the pieces of the tangram puzzle to make the basic shapes then complete the table showing which shapes are possible.

A game, a puzzle and a challenge involving counters being placed at the corners of a square on a grid.

A tetromino is a shape made of four squares joined edge to edge. How many different tetrominoes are there?

The chessboard has been broken into 13 pieces. Can you put it back together?

This is an interactive version of the puzzle described by Henry Ernest Dudeney in The Canterbury Puzzles

Move the pieces of the tower from one place to another in the minimum number of moves.

Arrange the digits 1 to 9 on the triangle so that the sum of the numbers along each side is equal to the given total.

Drag the 20 flowers into the gardens so that 9 flowers are visible from each window of the house.

Can you draw these diagrams without lifting your pencil from the paper? This is an interactive version of the traditional puzzle.

A step by step guide showing how to solve a Word Sum where each letter stands for a different digit.

A hands on activity requiring students to arrange Christmas ornaments in a square box.

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