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OpenStudy (anonymous):
What is the best divisibility test for 11
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OpenStudy (gorv):
abcdefg is number
OpenStudy (gorv):
now digit at even place are b d and f sum them up=b+d+f
OpenStudy (gorv):
sum of digit at odd place =a+c+e+g now difference of these to sum should be zero or divisible by 11
OpenStudy (gorv):
like 121
OpenStudy (gorv):
even place =2
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OpenStudy (gorv):
odd place =1+1=2
OpenStudy (gorv):
difference=2-2=0
OpenStudy (gorv):
so it will be divisible by 11
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