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Change the numbers on the apples so that the number on the lemon is 88.
[Double click an apple number to change it]
The Lemon Law states that the numbers on the apples are all single digit positive integers. The numbers on the oranges combine the apple numbers as tens and units. The number on the lemon is the sum of the oranges.
Can 88 be made according to the lemon law?
If not, can you prove it?
If it can be, how many different ways can it be done?
Which numbers can be made by the lemon law?
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Topics: Starter  Algebra  Puzzles
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Previous Day  This starter is for 12 January  Next Day
Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.
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Casio Classwiz CalculatorThere is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a highresolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app). As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols! This calculator has a highperformance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more... 
Teacher, do your students have
access to computers? 

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