<p>Okay, I have an old version from 2005, but do Collegeboard make mistakes in their Answer Keys?</p>
<p>Math Question:</p>
<p>The eggs in a certain basket are either white or brown.If the ration of the number of white eggs to the number of brown eggs is 2/3, each of the following could be the number of eggs in the basket, EXCEPT:</p>
<p>A: 10
B: 12
C: 15
D: 30
E: 60 </p>
<p>The right answer is A, isnt it? Am I stupid? The book says "B" would be the right one... It is so frustrating when you check your answers and you failed an easy one.</p>
<p>The smallest # of eggs would be 5. (2+3) so any multiple of 5 is a possibility. 12 is not a multiple of 5.</p>
<p>the answer in the book is right, its B</p>
<p>solve the problem this way:</p>
<p>assume that there are x egg in the basket in total</p>
<p>so the number of white eggs is 2/5*x
because the number of eggs must always be a natural number (positive integer), you can't have half of an egg so X must be divisible by 5</p>
<p>the only number that is not divisible by 5 is 12</p>
<p>Uh, that is actually so easy. I have been studying for about 6 hours today so I think my brain is just down. Thank you guys for an obvious answer :-)</p>