No Partner

Find pairs of numbers that add up to:

79

You can click on the pairs to hide them. When you have clicked on all the pairs the three numbers with no partner will remain.

17752451682326467535232775555662117612

Most of the numbers in the list above can be added to another number in the list to give a sum of 79 but three numbers do not have a partner. Can you find those three numbers and type them into the boxes below in order of size (smallest first)?

[Click on numbers above to hide them]

Correct Wrong Correct Wrong Correct Wrong

 

Find pairs of numbers that add up to:

59

If you make a mistake you can click on a hidden number to make it reappear. If you reload this page all of the numbers will change

3925535647928512143383124865032012168

Most of the numbers in the list above can be added to another number in the list to give a sum of 59 but three numbers do not have a partner. Can you find those three numbers and type them into the boxes below in order of size (smallest first)?

[Click on numbers above to hide them]

Correct Wrong Correct Wrong Correct Wrong

 

Find pairs of numbers that add up to:

91

Are there any quick ways of spotting the pairs? Could you start by just looking at the units digit of each of the numbers?

11766724294921706280565512815203563104281

Most of the numbers in the list above can be added to another number in the list to give a sum of 91 but three numbers do not have a partner. Can you find those three numbers and type them into the boxes below in order of size (smallest first)?

[Click on numbers above to hide them]

Correct Wrong Correct Wrong Correct Wrong

 

Find pairs of numbers that add up to:

70

You can feel pleased with yourself for completing this online exercise. Claim your Transum Trophy after checking your answers.

2822441716331183765195455125596258455326

Most of the numbers in the list above can be added to another number in the list to give a sum of 70 but three numbers do not have a partner. Can you find those three numbers and type them into the boxes below in order of size (smallest first)?

[Click on numbers above to hide them]

Correct Wrong Correct Wrong Correct Wrong

 

 

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.

Why am I learning this?

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 24 May 'Starter of the Day' page by Ruth Seward, Hagley Park Sports College:

"Find the starters wonderful; students enjoy them and often want to use the idea generated by the starter in other parts of the lesson. Keep up the good work"

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"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!"

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Featured Activity

Nine Digits

Nine Digits

Arrange the given digits one to nine to make three numbers such that two of them add up to the third. This is a great puzzle for practicing standard pen and paper methods of three digit number addition and subtraction.

Answers

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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.

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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.

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