Maths is considered as most difficult subject?
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@thebigk • Apr 15, 2012
@anoop-kumar-GDGRCn • Apr 15, 2012
@ishan-nohePN • Apr 15, 2012
@aarthivg-HH344f • Apr 16, 2012
@ramani-VR4O43 • Apr 16, 2012
@ishan-nohePN • Apr 17, 2012
I remember you discussing about Slide rules long time back. Are you referring to slide rule? 😀bioramaniIn the early sixties we were using only hand operated mechanical calculators. These can only add. By reversing the rotation we subtract. Multilication is just shift and add, while division is shift and subtract. In chemical engineering you need square roots all the time. We used the simple mathematics theorem that the number of the first n odd numbers equals the square root of n and got square roots using the mechanical monsters. (e.g. First three odd numbers are 1, 3 and 5. Their sum = 9, which is square of three)
To multiply by nine one has to rotate the shaft nine times. The mathematically equivalent method is to rotate in reverse once, shift and rotate forward once to get nine times the value with just two rotations.
Maths is fun.
@ramani-VR4O43 • Apr 17, 2012
Slide rules are analog devices where the scales are arranged proportinal to the logarithm of numbers. When you added two lengths the result is the sum of logarithms and so you get the product as answer. What I am talking about are the so called adding machines.IssueI remember you discussing about Slide rules long time back. Are you referring to slide rule? 😀
@anoop-kumar-GDGRCn • Apr 17, 2012
@ishan-nohePN • Apr 17, 2012
@ramani-VR4O43 • Apr 17, 2012
That particular model had a twenty digit accuracy. I could do close to 500 additions per minute. Every department had many of these. Slide rules could never match the accuracy.Issue#-Link-Snipped-# sir: Amazing, but it was not so much popular I guess!
Want to try it out 😀 Simply mechanical 👍
@ishan-nohePN • Apr 17, 2012
@aarthivg-HH344f • Apr 17, 2012
One good thing I do in my semester holidays is that, I teach vedic maths and some simple tricks to solve maths problem to students doing their schooling for free of cost, mainly, below poverty line. I always try to build up their interest towards maths, sometimes I have got success, many times failer. Things apart I personally get happy in doing such work.😀The_Big_KMathematics is difficult because it's taught in a boring way. In my opinion, unless one understands the application of mathematics; learning the theory is entirely boring. I mean, first tell people why integration is required and then tell them how integration solves problems.
Same applies to basic mathematics. Tell the kids importance of fractions and they'll love it!
@ishan-nohePN • Apr 17, 2012
That's a wonderful thing. #-Link-Snipped-# Why don't you start some Vedic maths related threads in Puzzles section? It will help everyone brush-up their knowledge and learn something new 😀aarthivgOne good thing I do in my semester holidays is that, I teach vedic maths and some simple tricks to solve maths problem to students doing their schooling for free of cost, mainly, below poverty line. I always try to build up their interest towards maths, sometimes I have got success, many times failer. Things apart I personally get happy in doing such work.😀
Is any other CE-ans do similar work? ( so that I can try to implement that too)😀
@aarthivg-HH344f • Apr 17, 2012
At present, My exams are around me😲 . It will take a month to get over.😔IssueThat's a wonderful thing. #-Link-Snipped-# Why don't you start some Vedic maths related threads in Puzzles section? It will help everyone brush-up their knowledge and learn something new 😀
@neeraj-iAaNcG • Apr 17, 2012
@ramani-VR4O43 • Apr 17, 2012
You should remember that multiplication with a manual device is repeated addition. If you have to multiply two ten digit numbers with large value digits you may end up spinning the shaft fifty to sixty times to do just one product. In many engineering calculations you have many terms in the numerator and denominator requiring quite a bit of spinning the shaft both forward and reverse for a simple multioperation calculation.Issue20 digit accuracy is simply marvelous. More fascinating is "500 additions per minute"?☕ Do we normally require it? What sort of problems require that much processing power from a manual device?