Conditions of Digit in The Places of Positive Integers Divisible by 7
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Abstract
We study conditions of digit in the places of positive integers divisible by . We found that the sum of products of digit in the ones place, tens place, hundreds place, thousands place, ten thousands place, hundred thousands place, millions place, ten millions place, hundred millions place, billions place, ten billions place, hundred billions place,
and
respectively, is divisible by
. In addition, we study conditions of positive integers with same digits which are divisible by
.
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References
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