This Starter requires Flash but a version that does not require Flash can be found here:
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?
Topics: Starter  Algebra  Puzzles
How did you use this starter? Can you suggest
how teachers could present or develop this resource? Do you have any comments? It is always useful to receive
feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.
If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:
This starter has scored a mean of 3.6 out of 5 based on 184 votes.
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.
There is a printable worksheet to go with this activity.
Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items chosen and recommended by Transum Mathematics to get you started.
Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=January12
Here is the URL which will take them to a related student activity.