<p>Pg. 857 no.10</p>
<li>If k is a positive integer, let <em>k</em> be defined as the set of all multipes of <em>k</em>. All of the numbers in which of the following sets are also in all three of the sets <em>2</em>, <em>3</em>, and <em>5</em>?</li>
</ol>
<p>A) <em>5</em>
B) <em>6</em>
C) <em>10</em>
D) <em>21</em>
E) <em>60</em></p>
<p>E - 60 Unless Im wrong</p>
<p>(e) is right but why?</p>
<p>use LCM (10 char)</p>
<p>I agree with Gyros</p>
<p>Has to be a factor of these numbers: 2, 3, 5</p>
<p>A) <em>5</em> - doesn't include 2, 3
B) <em>6</em> - doesn't include 5
C) <em>10</em> - doesn't include 3
D) <em>21</em> - doesn't include 2, 5
E) <em>60</em> - includes ALL</p>
<p>yay - - - your answer is E) 60</p>
<p>The lowest is 30, but since that isn't an answer, the next best one is 60, E.</p>