Question
Test the divisibility of: $10001001$ by $3$
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Answer
$10001001$ by $3$
$10001001$ is divisible by $3.$ It is because the sum of its digits, $1 + 0 + 0 + 0 + 1 + 0 + 0 + 1,$ is $3,$ which is divisible by $3.$
$10001001$ is divisible by $3.$ It is because the sum of its digits, $1 + 0 + 0 + 0 + 1 + 0 + 0 + 1,$ is $3,$ which is divisible by $3.$
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