IIT JEE , AIEEE Forum - Articles Category , Community shelf - Mathematics Revised.................................

shubham_sachdeva

hie all, i found this1 cool..so p[osting it.....

if u have to find any product e.g 21 X 14 . then how to find it without even using any sort of table.e.g table of 4 or 1..etc..

here is the simple way :-

in above example...firts letter is 2 & 1.. so draw 2 close horizontal lines & 1 single horizontal line at some distance as shown..now the next letters are 1& 4.so draw 1 single vertical line & 4 close vertical line as shown..now just draw 2 curves as shown......now on the upper side count the no. of point of intersection.there it is 2. now on the bottommost right section , point of intersections are 4. now write the no. of points of intersection in the rest section as shown below..here they are (8+1) = 9 .

so product is :- 294...

if a number more than 9 e.g 21 then add first digit(of this number) to the number written on the topmost left corner & then do the same...dats it..

similarily the above result can be generalised to big no.s

hope u find it useful..

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