Math 911

Test Preparation SAT Preparation
1

<p>A large cube with edge of 3 units is built from 6 small blue unit cubes and 21 small white unit cues. What is the greatest possible fraction of surface area of the large cube that could be blue?
a)1/9 b) 2/9 c) 1/3 d) 4/9 e) 2/3</p>

<p>I did it in every possible way, and I always got 16/54 max.. </p>

<p>the answer is c) 1/3 though o.O</p>

<p>the 2nd question:</p>

<p><a href="http://postimg.org/image/ozyezujw3/%5B/url%5D"&gt;http://postimg.org/image/ozyezujw3/&lt;/a&gt;&lt;/p>

2

<p>Imagine a Rubix cube. Corner pieces have 3 spots. Top, right, front. The most a cube can have showing is 3. If there are 6 blue small cubes, then all six are on corners. 3x6=18. 18/54= 1/3</p>

3

<p>Looking at the second one now</p>

4

<p>yeah the first one I got
thanks!</p>

5

<p>Oh wait think i got it … is it e)???</p>

6

<p>I just checked it from the answer key… It’s E)!
yaaay! XD lol</p>