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So a week ago, I was marking a few scripts of my students (Yes about half of them were honing their skills to handle prelim papers now; I hope you are too.) and I noticed a handful can’t [...]

Here is some sharing over a very fascinating constant . We know this is (up to 3 sig. fig. accuracy) or even (up to 7 sig. fig. accuracy). One of my favourite way of deriving this never-ending [...]