Which of the following numbers is completely divisible by 11 without any remainder?
Answer and explanation
Correct answer: A.
- Step 1: A number is divisible by 11 if the difference between the sum of digits at odd places and even places is 0 or a multiple of 11.
- Step 2: For : sum of odd digits ; sum of even digits ; difference .
- Step 3: Hence, is divisible by 11 ().
Answer
.
Why not the others: For , difference is ; for , difference is ; and for , difference is .
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