Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7 Level 8 Level 9 Description More Mental Maths

Beat The Clock

It's a race against the clock to answer 30 questions.

What are you waiting for? Quickly answer the questions below. This is level 3: Addition and subtraction of numbers less than 30. You can earn a trophy if you get at least 25 answers correct and you do this activity online at www.transum.org/go/?to=beat .

27 + 2

Correct Wrong

18 + 4

Correct Wrong

29 - 6

Correct Wrong

20 - 14

Correct Wrong

27 - 16

Correct Wrong

24 - 16

Correct Wrong

19 + 1

Correct Wrong

12 + 9

Correct Wrong

21 + 4

Correct Wrong

10 + 1

Correct Wrong

27 + 4

Correct Wrong

12 - 4

Correct Wrong

29 + 7

Correct Wrong

18 - 4

Correct Wrong

15 - 13

Correct Wrong

10 + 6

Correct Wrong

23 - 21

Correct Wrong

28 + 2

Correct Wrong

15 - 10

Correct Wrong

26 + 4

Correct Wrong

25 + 2

Correct Wrong

22 - 9

Correct Wrong

25 + 4

Correct Wrong

16 - 8

Correct Wrong

25 + 5

Correct Wrong

14 + 8

Correct Wrong

23 + 7

Correct Wrong

22 + 3

Correct Wrong

23 - 1

Correct Wrong

20 - 3

Correct Wrong

Beat The Clock

Is the clock too fast for you?
Did you make some mistakes?
Would you like to try again?

Start Again

© Transum Mathematics WWW.TRANSUM.ORG

This is Beat The Clock level 3. You can also try:
Level 1 Level 2 Level 4 Level 5 Level 6 Level 7 Level 8 Level 9


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.


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.

Please contact me if you have any suggestions or questions.

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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 12 July 'Starter of the Day' page by Miss J Key, Farlingaye High School, Suffolk:

"Thanks very much for this one. We developed it into a whole lesson and I borrowed some hats from the drama department to add to the fun!"

Comment recorded on the 28 May 'Starter of the Day' page by L Smith, Colwyn Bay:

"An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"

Each month a newsletter is published containing details of the new additions to the Transum website and a new puzzle of the month.

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Featured Activity



Interactive, randomly-generated, number-based logic puzzle based on the Latin square designed to develop numeracy skills. These puzzles are drag and drop and can earn you a Transum Trophy.


There are answers to this exercise but they are available in this space to teachers, tutors and parents who have logged in to their Transum subscription on this computer.

A Transum subscription unlocks the answers to the online exercises, quizzes and puzzles. It also provides the teacher with access to quality external links on each of the Transum Topic pages and the facility to add to the collection themselves.

Subscribers can manage class lists, lesson plans and assessment data in the Class Admin application and have access to reports of the Transum Trophies earned by class members.

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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.


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:

Alternatively, if you use Google Classroom, all you have to do is click on the green icon below in order to add this activity to one of your classes.

It may be worth remembering that if Transum.org should go offline for whatever reason, there are mirror sites at Transum.com and Transum.info that contain most of the resources that are available here on Transum.org.

When planning to use technology in your lesson always have a plan B!


Tuesday, February 17, 2015

"If you are not up to answering the questions quickly enough you could start by just doing the left column. If you can manage that progress to the left two columns until you build up enough speed to try all of the columns. Each time you start the clock the questions change so you do not need to worry about repeating yourself! Enjoy."

Andy Parkin, via Twitter

Friday, February 20, 2015

"How can I embed the code for Beat The Clock into my Wordpress blog?
Would like to make your games a feature, but better than a link."


Saturday, February 21, 2015

"Thanks for your question Andy. It can be done by using an inline frame. Here is the code you will need:
<iframe id="I1" name="I1" src="https://www.transum.org/Maths/Activity/Beat_The_Clock/" style="width: 963px; height: 970px">
It needs copying and pasting as text (not visual)."

Clint Lees,

Friday, May 14, 2021

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.


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Description of Levels



Level 1 - Addition of single digit numbers

Level 2 - Subtraction of numbers less than 20

Level 3 - Addition and subtraction of numbers less than 30

Level 4 - Multiplication facts up to twelve times twelve

Level 5 - Division facts in tables up to twelve.

Level 6 - Mixed Multiplication and Division

Level 7 - All four operations, two terms

Level 8 - All four operations, two terms, harder

Level 9 - All four operations, three terms

More on Mental Methods including lesson Starters, visual aids and self-marking exercises.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly.