October 2010 Math SAT Thread

<p>Ok, the argument over the die problem is getting pretty ridiculous. “I swear I got a 800, I’m a genius, I know everything, the answer was definitely 1/108!!”
First, that’s pretty damn pretentious to be so sure of yourself. Second… well, I got a different answer. (I could easily be wrong, I’ll admit that, but I’m pretty confident it was 1/54). </p>

<p>Here was how I reasoned that it wasn’t 1/108:
Everyone is saying its 1/216 + 1/216 = 2/216 = 1/108… but the problem is, there are 3 ways that 17 can appear. The argument that order doesn’t matter is wrong, because it does in fact matter. 566 != 656 != 665. All three of those appear the same, but those are 3 of the 216 possibilities. 216 was arrived at by multiplying out 6<em>6</em>6, because each die has 6 sides. It’s a permutation, not a combination. Because you used a permutation to calculate the TOTAL number of possibilities, then 665, 656, and 566 are DISTINCT values. Meaning that they must be counted as 1/216 for each value.
665 = 1/216
656 = 1/216
556 = 1/216
666 = 1/216
Total = 4/216 = 1/54</p>

<p>Like I said, I could be wrong, and I’d love to hear different explanations, but I’m pretty confident in my answer.</p>

<p>cookcfc clearest explanation by far, thanks
exactly what I did</p>

<p>the 4500 dollar one was the pie chart, the family spent 30,000 in a year i think and it asked what 15% of that was. which is 4500.</p>

<p>Does anyone remember the wording on the July and August question? Rumor has it that the answer was 8,000, and that number isn’t ringing a bell for me like all the others. I just was hoping a partial wording of the question would help clear it up for me a bit…</p>

<p>Oh yes! I remember that. It was definitely 4500 dollars.</p>

<p>^agreed. …</p>

<p>^The question was about the difference in the number of tickets sold in July and August.
They gave you an equation: N(t) = -2t + 30 (if I remember correctly)
where N(t) is the number of 1000s of tickets sold.</p>

<p>July was t = 14
August was t= 10</p>

<p>for overrated. to get 1080 u just multiplied the number of hours per week for each thing by 36 and then added em all up right. i forget what i put for that one.</p>

<p>for the obtuse triangle one…would 10 be right still? D:
I was being idiotic and I couldn’t remember how to solve for the smallest possible measurement. I don’t know WHY I didn’t put down 13 then, because I knew the maximum was 14. But I guess I liked the sound of 10, lmao.</p>

<p>780/790 for -1?</p>

<p>does anyone know what the problem was with the answer of “5/3”?? i remember getting 5/9
Also…here is what I remember getting for the fill in sections:
1)15
2)5/9 (the one i have a question on)
3)3
4)6000
5)1.2
6)24
7)8
8)12
9)2
10)290</p>

<p>sounds about right??</p>

<p>okay, so I don’t remember what my answer was for the 1080 one.</p>

<p>But this is how I worked it out:</p>

<p>the number of hours/week in 9th grade (1 week/5 days)(180 days/1year)=9th grade hours
the same for the rest of the grades and added it up</p>

<p>would I have gotten the right answer? not sure because in other posts people worked it out a different way.</p>

<p>Yes those seem right but how did people get ****ing 6000… That’s the only question I got wrong and I’m punching myself in the head right now.</p>

<p>for those that are still questioning the R B G Y question…
there were five choices.
117, 118, 119, 120, 121
Immediately knock out 117 and 121, because if it was one or the other, there would be two correct answers, as each is four apart.
Because green is the third out of four in the series, it must be an odd number. Therefore the only possible choice is 119. (odd + even = odd)</p>

<p>Wow i was going for 800 on math. I’ve gotten mainly 800’s on real QAS’s. I was done with math like 8 to 9 minutes every time. I regret it. I could’ve checked my *<strong><em>ing answers. I’ll probably take in november then for an 800. *</em></strong>!</p>

<p>That’s a much more elegant way, superfluous. I button mashed.</p>

<p>it was 1/54, there were 6^3 total possibilities=216 and four that equaled 17 and 18:666 656 665 566 so 4/216=1/54</p>

<p>Wait guys, can someone please answer.
Would 10 have worked for the obtuse triangle or did it have to be more than 10?</p>

<p>whats the question with the answer on the consolidated list as PR = 8? </p>

<p>and naomikt, it had to be more than 10 since the angle was more than 90 degrees. if it was 90 degrees it would be 10</p>

<p>the only way to roll 18 is with 3 6’s and the only ways to roll 17 are 665 656 566. so 4 possibilities total</p>