Question 1097998
<pre>
The greatest common divisor, GCD, of 18 and 27, which is 9.

BBBBBBBBB    <--9 boys
BBBBBBBBB    <--9 boys
GGGGGGGGG    <--9 girls
GGGGGGGGG    <--9 girls
GGGGGGGGG    <--9 girls

Edwin</pre>