Note :This is not a question !! Tutorial 3: Math tricks(contd.) Hope you like my tutorial series,Do provide you feedback .You can get the previous ones @http://openstudy.com/users/aravindg

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This trick is much famous but still I would like to add it to the series Multiplication of 11 with any number. (You can't use this rule for other numbers) _________________________________________________________________________ Let me explain this rule by taking examples 1) 234163*11 = 2---2+3---3+4---4+1---1+6---6+3---3 = 2575793 Means insert the sum of 2 successive digits and put 2 terminal digits in its place 2) 45345181*11 = 4---4+5---5+3---3+4---4+5---5+1---1+8---8+1---1 = 498796991 Here an extra case arises Consider the following examples for that 3) 473927*11 = 4+1--- (4+7-10) +1--- (7+3-10) +1--- (3+9-10) +1--- (9+2-10)--- (2+7) ---7 = 5213197 4) 584536*11 = 5+1---(5+8-10)+1---(8+4-10)---(4+5)---(5+3)---(3+6)---6 = 6429896

And an additional one for those who knew it already (i dont want to dissappoint anyone :) ) Multiplication of 5 with any number (You can't use this rule for other numbers) _______________________________________________________________________ Let me explain this rule by taking examples 1. 49*5 = 490/2 = 245. 2. 453*5 = 4530/2 = 2265. Understand the rule by 1 more example 5649*5 = 56490/2 = 28245.

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