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This is the Conversation Forum for Tips on How to Make Commuting Bearable << Make your commute more bareable by making it shorter Tabloids V Broadsheets >> Subject: Are you the SquareRooter? Posted Dec 11, 2004 by ViveAnn   Posting 1 Square Root of Five-digit Numbers If you haven't got a book handy, then a commute is a good time for thinking abstract thoughts. One such abstract thought came to one Researcher who practises doing approximate square roots of five-digit numbers in his head. Some people have way too much time on their hands... ***Self-depreciating humour. I salute you for being modest.*** But what really made me say, "Whew. Holy Shit. I have the basic grasp on Mathematics, but this guy is way up in the ivory tower of Math." WAS THE BELOW ***I have to say, "You are amusing."*** I invented this method while waiting for the number 9 bus in Southend. If you practise while you're on the tube you can get quite good at it, and then your friends will start calling you 'Rainman'. There is probably a better way of doing this, but I like this way because I thought of it by myself. Remember the squares of the numbers from 1 (1) to 31 (961) Think of a five-digit number: 65741 Take the first three digits: 657 What's the largest square number immediately below this? In this instance it's 625 (25 squared). Remember the square root of this number (ie.25) - the square root of 65741 is going to be 10 x this number So the square root of 65741 is going to be 25n.nnn >>okay... I believe you for no other reason but for the fact that I do not squareroot. >>>alright... laugh at my ignorance. Conversation list Most of the content on h2g2 is created by h2g2's Researchers, who are members of the public. The views expressed are theirs and unless specifically stated are not those of the BBC. The BBC is not responsible for the content of any external sites referenced. In the event that you consider anything on this page to be in breach of the site's House Rules, please click on the relevant button to alert our Moderation Team. Conversation list

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