x = 3
y = 4
Tweet about this starter  Share 
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 3.0 out of 5 based on 256 votes.
Previous Day  This starter is for 20 April  Next Day
There are of course no end of correct answers and here are some examples.
There is at least one mistake. Can you find the errors when x=3 and y=4?
\(x + y = 8\)  \(x  y = 1\)  \(y  x = 4\) 
\(2x + 3y = 22\)  \(5x  2y = 7\)  \(4y  x = 13\) 
\(xy  10 = 9\)  \(180  2x + y = 186\)  \(20x  3xy = 24\) 
\(x^2 + y = 13\)  \(10x  y^2 = 14\)  \(y^2  x^2 = 7\) 
\(x^2y + 13 = 49\)  \(x^2y^2  2x = 138\)  \(x^2y^2 = 576\) 
\(x! + y = 10\)  \(5(x + y) = 35\)  \(3y \div x = 4\) 
\(\frac{xy}{2}= 6\)  \(\frac{84}{xy}= 7\)  \(\frac{15y}{5x}= y\) 
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.
Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to a related student activity.