For the 22 and 21 Marbles problem... haha marbles. It's my name

Test Preparation SAT Preparation
1

<p>Okay. People say 8 and people say 6. I think 8 is wrong because then green is greater than red which is not what the problem said. 6 i THINK i wrong too because to start out with you have 22 red and 21 Green marbles so the answer i thought was 0. I originally put 6 too, but i changed it to 0 because of this. If 0 is wrong, can anyone tell me the reason why?</p>

<p>O yea... and for that 4+ rectangle problem. I put 4 because the area has to = 12? and only 6 values work and two is already used. So i thought the answer was 4. But actually i might be wrong.</p>

2

<p>I put 8.</p>

<p>There are 25 red and 25 green. You take out 3 red and 4 green. You take out 13 more. What's the minimum number of reds to remove and have more reds than green.</p>

<p>If you take 6 red (and 7 green), you end up with 9 red and 11 green total.</p>

<p>If you take 7 red (and 6 green), you end up with 10 red and 10 green total.</p>

<p>If you take 8 red (and 5 green), you end up with 11 red and 9 green total. ^^^^^Ding ding ding! We have a winner!</p>

3

<p>13 marbles</p>

<p>3 red 4green
(1 red marble+3)=4 red /////// (13 original -1 red marble)+(4)=16 green
(2+3)=5 red/////// (13-2)+(4)=15 green
(3+3) = 6 red ////// (13-3)+(4)=14 green
(4+3) = 7 red ////// (13-4)+(4)=13 green
(5+3) = 8 red ////// (13-5)+(4)=12 green
(6+3) = 9 red ////// (13-6)+(4)=11 green
(7+3) = 10 red ///// (13-7)+(4)=10 green
(8+3) = 11 red ///// (13-8)+(4) = 9 green</p>

<p>^^ at this point, red greater than green. So at least 8 of the 13 beads must be red in order for red ro be > green/</p>

4

<p>well. read what i said though. red is already bigger than green in the first place. so the least number would be 0 because.</p>

<p>first you have 25 red and 25 green. Take 3 from red and 4 from green.</p>

<p>22 red 21 green. red is bigger than green so the least would be 0. and what are you smoking? 22-6 does not equal 9... where did you get that?</p>

5

<p>you're reading the damn question wrong. there are 3 red and 4 green. then there are 13 UNKNOWN. How many of those UNKNOWN must be red in order for red > green.</p>

6

<p>yea... o my gosh man... nvm. I still think it's zero. I KNOW there is 13 unknowns and there were actually 4 greens. but still either way, there is GOING to be more red marbles in the first place because you subtracted 3 and 4 from the 25 and 25. it can be ALL green!!! and no reds taken out and it's going to be bigger.</p>

7

<p>it has nothing to do with the amt of green and red from the 25 and 25. IT HAS TO DO WITH THE 13 AND THE 3 reds and 4 greens.</p>

8

<p>I put 0 too.</p>

<p>I read it over a few times and didn't see why it should be anything different. 8 would work if you did it the other way, but this was a pretty crappy question.</p>

9

<p>than what's the point with the 25 and 25 than? College Board usually put values that you WILL use.</p>

10

<p>I can't remember the question exactly, but I still don't think it was very clear.</p>

<p>The answer was probably 8, but I still think it was unclear.</p>

<p>I had two grid-in sections, so I hope this was the experimental one.</p>

11

<p>was this free response or MC?</p>

12

<p>this was not experimental. i got it and i had writing experimental.</p>

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<p>Free response</p>

14

<p>College board will put numbers you don't use. See the rectangle inside of a circle problem as an example.</p>

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<p>Actually, on second thought CB doesn't include numbers you don't use. The rectangle inside of a circle problem gave the perimeter so you know that a rectangle could actually fit.</p>

<p>In this case, I believe they give you 25 of each so you know that you won't run out of one color or another.</p>

16

<p>note: the question asks how many red marbles must be taken out to have a majority of red > green of OUTSIDE marbles</p>

17

<p>the answer is 8, for sure.</p>

18

<p>The answer is 8. I thought the only trick would have been putting 7. If there were 7, then they'd be equal.
The point to the 25 is just saying that you wont run out of a certain color. They could have said a 100 of each, its just to eliminate stipulation cases.</p>

19

<p>Can anyone recite the specific question? Part of this disagreement seems to be over the issue of the question that was being asked.</p>

20

<p>There are 25 red/ 25 green in a jar. A person takes out 3 red, 4 green. THen he takes out 13 more, how many of those 13 have to be red for there to be more red marbles than green marbles out of the jar.</p>