Arrange the numbers on the yellow tiles so that the sum of the numbers in the vertical line is the same as the sum of the numbers in the horizontal line
How many different ways are there of doing this task?
A selfchecking, interactive version of this activity with 30 different puzzles is
here.
Answers
Here are all of the 36 possible solutions.

Casio Classwiz Calculator
There 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? Do they have iPads or Laptops in Lessons?
Whether your students each have a TabletPC, a Surface or a Mac,
this activity lends itself to eLearning (Engaged Learning). 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=February3
Here is the URL which will take them to a related student activity.
Transum.org/go/?to=plane