Calculations appear on the screen every few seconds. This mental arithmetic starter provides pace to the start of the Maths lesson.

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

The calculations are obscured by ink blots. What do you think the calculations would look like if there were no blots?

A game in which players take turns to add a single-digit number to what is already in the calculator. The winner is the player who makes the display show 30.

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

Three consecutive numbers multiplied together give a given product. Pupils are asked to figure out what the numbers are.

Arrange the digits 1 to 6 to make a three digit number divided by a two digit number giving a one digit answer.

Begin with one, double it, double it again and so on. How many numbers in this sequence can you write down before the register has been called?

Find out which of the calculator keys is faulty from the given information. A mathematical puzzle requiring good problem solving strategies.

If each number in a sequence must be a factor or multiple of the previous number what is the longest sequence that can be made from the given numbers?

An activity involving a broken calculator which is missing the four button. Can you evaluate the given expressions without using the four?

Find four numbers from those given that add up to 999. How many different sets of four numbers can be found?

A clock face containing only the number 4. Can you make a clock face containing any other single number?

To find out whether a number is happy or not, square each of its digits, add the answers and repeat. If you end up with 1 the number is happy! How many other happy numbers can you find?

If six girls can plant 90 trees in a day. How many trees can ten girls plant in a day? The unitary method.

Pens cost 12p each, Pencils cost 9p each, Richard spent 72p altogether. How many pens and pencils did he buy?

Loosely based on the famous television show, how many questions cn you come up with for a given answer?

Check a student's homework. If you find any of the answers are wrong write down a sentence or two explaining what he did wrong.

The starter is a PowerPoint file containing a twenty question mental arithmetic test. It will advance from one question to the next automatically.

Which numbers when multiplied by the number of letters in the word(s) of the number give square numbers?

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

Divide one whole number by another on your calculator. If the answer has one digit repeated but no other digits you have a Noodlewhack.

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

Work out the answers to the given calculations then add the answers together. There are three different levels of difficulty.

Use your calculator to find which whole number divided by another whole number gives a recurring decimal.

It is called Refreshing Revision because every time you refresh the page you get different revision questions.

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.

Work out which is the best scheme for Sid to choose for his summer bonus. One scheme involves a common misconception about percentages.

An activity involving a calculator which is missing the six button. Can you evaluate the given expressions without using the six?

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

Six students borrow £5000 to help pay for their university course. Calculate how much each student will have to pay back to the lender.

Find three numbers from those given that add up to 1000. How many different sets of three numbers can be found?

The Verruca Value of a word is the number of vowels multiplied by the number of consonants. How many words can you find with Verruca Value of 24?

A game involving mental arithmetic and strategy for two players or one player against the computer.

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

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.

Investigate the ways of making up various postage amounts using 3p and 8p stamps. An online stamp calculator is provided for you to check your working.

A self-marking exercise on dividing numbers of up to four digits by one or two-digit whole numbers using the formal written methods of short and long division

It is a race against the clock to answer 30 mental arithmetic questions. There are nine levels to choose from.

A self marking exercise testing the application of BIDMAS, an acronym describing the order of operations used when evaluating ex

Find your way through the maze encountering mathematical operations in the correct order to achieve the given total.

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

Some of the buttons are missing from this calculator. Can you make the totals from 1 to 20?

Find two decimal numbers that add up to exactly one. What is the product of these two decimals?

An online darts game for one or two players requiring skill, strategy and mental arithmetic.

A fun game requiring you to find numbers which add up to the target number as quickly as possible.

Find which divisions result in whole number quotients. A mental arithmetic speed challenge.

A visual aid designed to be projected in the classroom. Here you can find the quick ways of telling whether a number is exactly divisible by the numbers two to twelve.

Examples of formal written methods for addition, subtraction, multiplication and division.

A self-marking exercise on counting forwards or backwards in tens, hundreds, thousands etc.

Use written methods to answer ten arithmetic questions. When you have finished you will find the results of this amazing research.

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

Use your mental arithmetic skills to add up the values of the letters in these mathematical words.

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.

For each pair of numbers subtract the sum from the product then divide the result by 20 without a calculator.

This application will pick the bingo numbers for you and present each of the numbers as a mathematical expression.

Solve multi-step problems in contexts, deciding which operations and methods to use and why.

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.

A daily workout strengthening your ability to do the basic mathematical operations efficiently.

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

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

Mathematical questions with five possible answers. If you get 20 correct you can add your own question to the database.

Arrange the sixteen numbers on the four by four grid so that groups of four numbers in a pattern add up to the same total.

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?

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

Can you multiply a number by 1001 in your head? This exercise provides practice in this and other similar challenges.

A mental arithmetic visual aid that displays random calculations then after a few seconds displays the answers.

A game involving chance and choice requiring an ability to calculate the remainder when a two digit number is divided by a single digit number.

The six button has dropped off! How could these calculations be done using this calculator?

Use just six keys on your calculator to make a given total. How many different ways can it be done?

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

Drag stamps onto the envelopes to make the exact postage as shown at the top left of each envelope.

Test your understanding of standard form (scientific notation) with this self-marking quiz.

How fast can you answer times table questions? This activity provides feedback to help you improve.

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

Ten students think of a number then perform various operations on that number. You have to find what the original numbers were.

Find as many sets of three of the available numbers as possible which add up to the given total.

A game for two players or teams testing their speedy reactions to mental arithmetic questions.

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

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