Fonia noticed that her phone number read the same when viewed upside down.
Her number began 081 and was followed by seven digits.
The two digit number formed by the fifth and sixth digits is divisible by eleven.
The two digit number formed by the fourth and fifth digits is divisible by nine.
The two digit number formed by the sixth and seventh digits is a square number.
What is Fonia's phone number?
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Can you make up some clues for your own phone number?
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 high-resolution 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 high-performance 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.
Here is the URL which will take them to a related student activity.