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प्रश्न
Using the divisibility test, determine which of the following number is divisible by 11:
10000001
उत्तर
Sum of the digits at odd places = 1
Sum of the digits at even places = 1
Difference = 1 − 1 = 0
As the difference between the sum of the digits at odd places and the sum of the digits at even places is 0, therefore, 10000001 is divisible by 11.
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