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These are the Transum resources related to the statement: "Pupils should be taught to identify common factors, common multiples and prime numbers".

Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.

- Convoluted Find the runs of four multiples in order as quickly as you can.
- Dump-A-Dice Race An online board game for two players involving prime and square numbers and making choices.
- Factor Trees Create factor trees to find the prime factors of the given numbers.
- Pick The Primes Pick the prime fruit from the tree as quickly as possible. Practise to improve your personal best time.
- Prime Pairs Game A game for two players who take turns to select two numbers that add up to a prime number.
- Prime Square 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.
- Satisfy Place the nine numbers in the table so they obey the row and column headings about the properties of the numbers.
- Scallywags and Scoundrels 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.
- Sieve of Eratosthenes A self checking, interactive version of the Sieve of Eratosthenes method of finding prime numbers.
- Three Prime Sum A self-marking challenge to write each of the given numbers as the sum of three prime numbers.
- Three Ways Find three different ways of multiplying four different digits together to get the given target number. There are nine levels for this online challenge.
- Venn Diagram Place each of the numbers 1 to 16 on the correct regions on the Venn diagram.

Click on a topic below for suggested lesson starters, resources and activities from Transum.

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