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Find the digit that makes _ 3520 by 9
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Find the digit that makes _ 3520 by 9
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Jul 12, 2017
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Find the digit that makes _ 3520 by 9
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Michael Lawton
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Remember the divisibility rule for 9. The sum of the digits of the number must be divisible by nine.
Let the digit be
. Then
has to be divisible by nine. Recalling that
, we note that
.
Alyn
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Jul 19, 2017
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Alyn
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