In the given question, fill in the blanks to make the statement true.
If a three-digit number abc is divisible by 11, then ___ is either 0 or multiple of 11.
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Solution
(a + c) - b
Since, abc is divisible by 11, the difference of sum of its digits at odd places and that of even places is either zero or multiple of 11, i.e. (a + c) - b is either zero or multiple of 11,