Do these walls look grubby to you? That's what the agent we rented from claimed... But notice the horrible purple patch - something he'd promised to paint over in June 2004. This photo was taken 7 August 2005.
BrainTwister #45: Square differences
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From New Scientist #3516, 9th November 2024 [link] The number 9 can be
written as a difference of two squares as 3^2 – 0^2 = 9 – 0 = 9. (a) Can
you find a ...
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