<p><span style="font-size:22px"><a target="_blank" href="https://www.prepswift.com/quizzes/quiz/prepswift-divisibility-rules-1-2-3-4">Divisibility Rules (1, 2, 3, 4) Exercise</a></span></p><ul>
<li>All integers are divisible by $1$.</li>
<li>An integer is divisible by $2$ if it is even -- if it ends in $0$, $2$, $4$, $6$, or $8$.</li>
<li>An integer is divisible by $3$ if the sum of the digits in that integer is also divisible by $3$.
<ul>
<li>For example, $816$ is divisible by $3$ because $8+1+6=15$, a number divisible by $3$.</li>
</ul>
</li>
<li>An integer is divisible by $4$ if the last two digits in that integer are also divisible by $4$.
<ul>
<li>For example $56$,$234$,$332$ is divisible by $4$ because $32$ is divisible by $4$.</li>
<li>Note that if the last two digits are $00$, the entire number is divisible by $4$ because $00$ is divisible by $4$.</li>
</ul>
</li>
</ul>