If six girls can plant 90 trees in a day, how many trees can ten girls plant in a day?
If five men can dig a hole in one hour, how long will it take two men to dig half a hole?
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Topics: Starter  Arithmetic  Problem Solving  Ratio
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If a hen and a half, lays an egg and a half, in a day and a half. How many eggs will 9 hens lay in 6 days? 
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... 
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access to computers? 

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That's not how this works. That's not how any of this works. pic.twitter.com/EdSSJInqEp
— Doug Mataconis (@dmataconis) October 9, 2017