<h2><u><em>In order to find the next time Kendra will have both tests on the same day, find the least common multiple of each increment of days.
</em></u></h2><h2><u><em></em></u></h2><h2><u><em>Write some multiples of each number, and then find the smallest multiple that both numbers have in common.
</em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em>The smallest multiple that both numbers have in common is 36.
</em></u></h2><h2><u><em></em></u></h2><h2><u><em>Therefore, Kendra will have both tests on the same day again in 36 school days.
</em></u></h2><h2><u><em></em></u></h2>