prove that number is divisible by 11, without actual division. options-(a) 31,16,365(b) 9,01,351
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For any number to be divisible by 11 it's difference of the sum of even and odd places must be divisible by 11.
(a) 3116365
odd-5+3+1+3=12
even-6+6+1=13
difference is 1
hence not divisible by 11
(b) 901351
odd-1+3+0=4
even-5+1+9=15
difference is 11
hence divisible by 11
(a) 3116365
odd-5+3+1+3=12
even-6+6+1=13
difference is 1
hence not divisible by 11
(b) 901351
odd-1+3+0=4
even-5+1+9=15
difference is 11
hence divisible by 11
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