What least number must be subtracted from 3401, so that the sum is completely divisible by 11?
A) 3 B) 1 C) 2 D) 0
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C) 2
The test of divisibility by 11 can be explained as follows :-
“The difference of sums of alternate digits should 0 or multiple of 11.”
The sum of alternate numbers in 3401 are 3+0=3 and 4+1=5 and the difference of these two sums are 2. To fulfill the above condition 2 has to be reduced from the given number to make it divisible by 11.
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