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?

Find four single digit numbers that multiply together to give 120. How many different ways are there of answering this question?

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?

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.

This a game for one or two players. The winner is the first to line up four numbers with a common factor.

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

Practise using the quick ways to spot whether a number is divisible by the digits two to nine.

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.

Practise the skills of algebraic factorisation in this structured online self marking exercise.

The digital version of the popular fizz buzz game. Press the buzzers if they are factors of the counter.

This game for one or two players is an exciting challenge to demonstrate an understanding of factors and multiples.

Practise finding the highest common factor (H.C.F), sometimes called the greatest common divisor, and the lowest common multiple (L.C.M) of two numbers.

A demonstration of how to find the highest common factor (HCF or GCD) and the lowest common multiple (LCM) of two numbers.

Pick the prime fruit from the tree as quickly as possible. Practise to improve your personal best time.

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.

A self checking, interactive version of the Sieve of Eratosthenes method of finding prime numbers.

Find square roots and cube roots by first calculating the prime factorisation of a number.

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

Find three different ways of multiplying four different digits together to get the given target number. There are nine levels for this online challenge.

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