Question
Which of the following numbers is divisible by
11?Solution
6481729: Difference = (6 + 8 + 7 + 9) – (4 + 1 + 2) = 30 – 7 = 23
8291457: Difference = (8 + 9 + 4 + 7) – (2 + 1 + 5) = 28 – 8 = 20
4728365: Difference = (4 + 2 + 3 + 5) – (7 + 8 + 6) = 14 – 21 = 7
3567245: Difference = (3 + 6 + 2 + 5) – (5 + 7 + 4) = 16 – 16 = 0
3567245 is divisible by 11.
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