Is it possible to rearrange the numbers, row and column headings so that this table is mathematically correct?
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IMPORTANT NOTE: The student version of this activity provides a choice of more row and column headings. Click the 'Change Headings' button. Does that make it easier?
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? 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=November18
Here is the URL which will take them to a student version of this activity.
Transum.org/go/?to=Satisfaction