What is the least value of k. So that 123k578 is divisible by 11.
Pick one:  A) 8  B) 7  C) 5  D) 6  E) 4
Explanation:   The Difference of the sum of the digits at odd place and the sum of the digits at even place of the number, is either 0 or a number divisible by 11.   (1 + 3 + 5 + 8) - (2 + k + 7) = 17 - 9 - k = 8 - k   Therefore if k = 8, then the value become zero.   k = 8 is the least value   so that 123k578 is divisible by 11.   8nswer: Option 8
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What is the least value of k. So that 123k578 is divisible by 11.