Answers

2015-05-11T16:20:51+05:30
By subtracting the sum of alternative numbers
eg
9856
we add 9 and 5 
we get 14
then we add 8 and 6
we get 14
then we subtract the both sum 14-14
we get 0
if the result is divisible by 11 it is divisible 
since 0 is divisible by 11 it is divisibleby 11
 


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2015-05-11T19:46:41+05:30
A number is divisible by 11 if the difference of the sum of the digits at the even and odd places is either equal to 0 or a multiple of 11.
 
for eg:- 1331  
 The sum of even places=4
 the sum of odd places = 4
diff: 0
 So , the number is divisible

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