# Factor Trees

## Create factor trees to find the prime factors of the given numbers.

##### InstructionsSieveHCFLCMChallengeMore Factors

Type whole numbers greater than one into the circles that multiply together to give the number in the circle above them. Each branch of the tree will eventually end in a prime number. You can read the full instructions for more information about this activity.

 16 Enter a pair of factors (excluding 1) of the number above. Check 30 Enter a pair of factors (excluding 1) of the number above. Check 42 Enter a pair of factors (excluding 1) of the number above. Check 54 Enter a pair of factors (excluding 1) of the number above. Check 78 Enter a pair of factors (excluding 1) of the number above. Check 104 Enter a pair of factors (excluding 1) of the number above. Check 105 Enter a pair of factors (excluding 1) of the number above. Check 148 Enter a pair of factors (excluding 1) of the number above. Check 186 Enter a pair of factors (excluding 1) of the number above. Check 248 Enter a pair of factors (excluding 1) of the number above. Check

## Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

## Transum.org

This web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available.

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Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician?

Comment recorded on the 5 April 'Starter of the Day' page by Mr Stoner, St George's College of Technology:

"This resource has made a great deal of difference to the standard of starters for all of our lessons. Thank you for being so creative and imaginative."

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"My year five children look forward to their daily challenge and enjoy the problems as much as I do. A great resource - thanks a million."

#### Polybragging

If you have ever played a card game called Top Trumps you will know the main idea of this game already. Based on the properties of polygons this game for two or more players is a fun way to learn geometric facts.

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## Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

## Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.

## Teachers

If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

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