Tuesday 20 November 2012

two tricks of math

Always remember these two tricks of math

  1.   multiply with 9,99,999,9999 and ........
       Simply 8473859*99=8473859*(100-1)   like this for 9,999,9999, and etc

       2.     Multiply by 5 15 25 35 45   etc
   
        Simply   79459485*25=79459485*(100/4)
        Simply   79459485*15=79459485*(30/2)
        Simply   79459485*5=79459485*(10/2)
              and so on ................


Any problem post comment here  .........
        

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