Take this quiz in SAT math!

Test Preparation SAT Preparation
1

<p>My math teacher gave us this quiz and said there is proof that if you can get every answer right you should get at least 500 on your math SAT - so all you supposed 800 SATers out there get ready - this quiz is supposed to cover "ALL BASIC MATH"</p>

<p>Questions first - post your answer ill post mine after I get a few responses </p>

<p>1) Find four consecutive odd integers such that 4 times the sum of the first and the third is 4 larger than 4 times the forth</p>

<p>2) Lee has an urn with 8 white marbles and 10 black marbles. A marble is drawn at random and not replaced. Then a second marble is drawn randomly. What is the probability that the first is white and the second is black?</p>

<p>3) A single die is rolled 4 times and comes up 3,4,5,6. What is the probability that the next roll will produce a number greater than 2?</p>

<p>4) Average of 5 numbers in 790.6 - If first four numbers are 80.2,91.6,123,204.7, what is the sum of the five numbers???</p>

<p>5) The firemen counted fire hydrants. They counted 9120 fire hydrants, which was 128 percent too high. What is correct count of fire hydrants?</p>

<p>THIS GOT ME REALLY ****ED CUZ I GOT 4/5 now i wonder if I will even be able to get a 500 on my SAT!!!</p>

<p>so comon math kids shoot away and see how good you really are.</p>

2

<ol>
<li><p>4a + 12 =
4 ( a + a + 4) = 4 + 4a + 24
8a + 16 > 4a + 28
4a > 12
a > 3
so..
3,5,7,9</p></li>
<li><p>80/357 (10/16 * 8/17)</p></li>
<li><p>2/3 </p></li>
<li><p>790.6 * 5 ... = 3953 (dont have a calculator)</p></li>
<li></li>
</ol>

<p>1.28 X + x = 9120
2.28x = 9120
x = hmm wow this works out good. 4000</p>

3

<p>gyros that #5 doesnt match with the solution i got, you sure about that?</p>

4

<p>It's really luck...if you get the problems you know how to do, which is why the more questions, the more your percentage right.</p>

5

<p>well what is 4000 * 1.28 ?</p>

<p>It is like 1280 * 4 = 5120</p>

<p>Now add it to 4000 again and u get 9120.</p>

<p>What I did for this one was pretend they only counted 100% over the limit.</p>

<p>So then the number of F. hydrants would of course be 4560. </p>

<p>Now backsolve. How do you get 9120 from 4560?</p>

<p>You do 4560 * 100% + 4560 (don't know if this is the real formula but it seems like it.)</p>

<p>Also because its 128% over you should know it has to be less than 4560 so thats how i got 4000.</p>

<p>and if u plug it in my formula i invented (I seriously did this on the spot. i don't know if its real but it worked). 4000 X 1.28 + 4000 = 9120.</p>

6

<p>I think he used 5120 instead of 9120.</p>

7

<p>1) Find four consecutive odd integers such that 4 times the sum of the first and the third is 4 larger than 4 times the forth</p>

<p>Consecutive odd integers: n, n+2, n+4, n+6</p>

<p>4(n + n + 4) = 4(n+6) +4
2n + 4 = n + 7
n=3</p>

<p>Consecutive odd integers: 3, 5, 7, 9</p>

<p>2) Lee has an urn with 8 white marbles and 10 black marbles. A marble is drawn at random and not replaced. Then a second marble is drawn randomly. What is the probability that the first is white and the second is black?</p>

<p>Probability of choosing white marble for first marble: 8/18
Probability of choosing black marble for second marble: 10/17</p>

<p>Probability of choosing white then black: 4/9 x 10/17 = 40/153</p>

<p>3) A single die is rolled 4 times and comes up 3,4,5,6. What is the probability that the next roll will produce a number greater than 2?</p>

<p>3,4,5,6 out of 1,2,3,4,5,6 makes 4/6 or 2/3</p>

<p>4) Average of 5 numbers in 790.6 - If first four numbers are 80.2,91.6,123,204.7, what is the sum of the five numbers???</p>

<p>790.6 x 5 = 3953</p>

<p>5) The firemen counted fire hydrants. They counted 9120 fire hydrants, which was 128 percent too high. What is correct count of fire hydrants?</p>

<p>100% + 128% = 228%.</p>

<p>2.28F = 9120</p>

<p>F = 4000</p>

8

<p>^Yep you have the same things as me and I have someone else who says 4000! You guys are forgetting to add the 4000 again.</p>

<p>Oh and sorry I messed up number 2. I saw that there were 8 and 9 respective marbles O_O.</p>

9

<p>I also got 4000 for number 5. </p>

<p>The thing is, "128% too high" means "in excess of 128%" which means "128% in addition to the regular 100%"</p>

<p>"28% too high" means they counted 128% of the actualy number of fire hydrants.</p>

10

<p>Man I always mess up these stupid questions at like the dumbest parts. Happens to me on the SAT as well and I get like a 780 always.</p>

11

<p>
[quote]
Man I always mess up these stupid questions at like the dumbest parts. Happens to me on the SAT as well and I get like a 780 always.

[/quote]
</p>

<p>I did just that with the fire hydrants problem. :D</p>

12

<p>guess I must have completely failed the Math.
Maybe I don't want my scores after all.</p>

13

<p>
[quote]
4) Average of 5 numbers in 790.6 - If first four numbers are 80.2,91.6,123,204.7, what is the sum of the five numbers???</p>

<p>5) The firemen counted fire hydrants. They counted 9120 fire hydrants, which was 128 percent too high. What is correct count of fire hydrants?

[/quote]
</p>

<p>WHy the hell don't these problems make sense to me? Isn't that thing about 5 number average in question 4 pointless, does that mean anything solving it?</p>

<p>The way it's written reads like gibberish , it sounds like: THese number are just 5 numbers that COULD be used to make up 790.6. So how the hell should I know the random number sum? It doesn't read right to me "average of what 5 numbers in 790.6? do they want to me to average? first 4 numbers of what? * why do I suck at probability?*</p>

<p>In number 5, nevermind I just did it again ... apparently I score high in reading but read imaginary numbers in math. I read before that they counted five fire hydrants....</p>