Lemon Law

Instructions

Click on the small circles to change the numbers on the apples.

See how the apple numbers affect the totals. Your challenge is to make the number on the lemon equal the target below:

Target

Each time you complete a challenge you will earn a lemon. Ten lemons will earn you a trophy!

8

4

3

2

1

0

9

8

7

6

5

8

4

3

2

1

0

9

8

7

6

5

8

4

3

2

1

0

9

8

7

6

5

8

4

3

2

1

0

9

8

7

6

5

0

0

0

0

0

Lemon Lemon Lemon Lemon Lemon Lemon Lemon Lemon Lemon Lemon

There is a printable worksheet to go with this activity.

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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?

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"A really useful set of resources - thanks. Is the collection available on CD? Are solutions available?"

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Featured Activity

Lemon Law

Lemon Law

A fascinating digit changing challenge. Change the numbers on the apples so that the number on the lemon is the given total. Can you figure out, by understanding place value, how this works?

Numeracy

"Numeracy is a proficiency which is developed mainly in Mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables."

Secondary National Strategy, Mathematics at key stage 3

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 main page links to more activities designed for students in upper Secondary/High school.

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

Sophie Allpress, DTC

Friday, May 25, 2012

"I think the "lemon law" is bugged because it freezes when you click "next challenge" on the last challenge. also if that button works for you, I also found problems clicking the "claim your trophy"."

Transum,

Saturday, May 26, 2012

"Thanks for letting us know Sophie. You were right. In certain browsers it didn't work properly. The bug has now been fixed."

Mazin Ali, HPS

Saturday, January 28, 2017

"THIS IS AMAZING! Thank you Transum for making this starter of the day. I really appreciate it. My whole class loves it and find this challenge very difficult but it is improving skills."

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.

Apple

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