Question
Which of the following numbers is divisible by
11?Solution
5184623: Difference = (5 + 8 + 6 + 3) – (1 + 4 + 2) = 22 – 7 = 15
7493158: Difference = (7 + 9 + 1 + 8) – (4 + 3 + 5) = 25 – 12 = 13
6342187: Difference = (6 + 4 + 1 + 7) – (3 + 2 + 8) = 18 – 13 = 5
7821465: Difference = (7 + 2 + 4 + 5) – (8 + 1 + 6) = 18 – 15 = 3
None of them is divisible by 11
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