SAT January 2012 - Math

<p>@liljimmy</p>

<p>it’s because
<br>
<strong>| |
|</strong>
| 12
10</p>

<p>the two unknown sides to the left still add up to 12</p>

<p>and the two unknown sides at the top add up to 10</p>

<p>i CANT believe i didn’t grasp this at the time… i want to bang my head against my desk right now.</p>

<p>why was the circumference 2pij and not just pi*j?? i though j was the diameter?</p>

<p>no, j and k were radii.</p>

<p>@roboticsfre4k why wouldn’t the two unknowns at the top add up to 12?</p>

<p>sma719 I did the same thing… I thought j and k were diameters. They were actually radii.</p>

<p>The correct answer is (j+k)pi</p>

<p>The incorrect answer is jpi/2 + kpi/2</p>

<p>Anyone else think this was the easiest math section they’ve ever taken?</p>

<p>@cbeauchene yes.</p>

<p>I agree minus the sequence problem</p>

<p>Anyone remember the question about the dog’s weight and length?? Something like the difference between the Weight and 3/4 the Length must be less than 5? I think I put 40 as one possible length/weight, not sure…</p>

<p>Anyone?</p>

<p>anything between 31 and 41 for the dog problem is correct… including 31 and 41 i believe so u got it :)</p>

<p>I meant going past the origin, meaning into quadrant III. (Not <em>thru</em> the origin)
Since the radius was a whole number (10), it couldn’t have passed directly thru the origin bec the distance couldn’t have possibly been a whole number given the center of the circle.
Therefore, it’s 4 whether it went into quadrant III or never went into quadrant III. So the only check was whether it went thru the origin. And that seems right that passing thru the origin would count as 3 intersections.</p>

<p>Is it definite that order mattered on the ABCD number line question?</p>

<p>@michael
I don’t know. IF the order didn’t matter the answer is ONE, if it did matter, the answer is EIGHT. We will have to see…I wish I could just read the problem again to see if it mattered or not.</p>

<p>@ drac313</p>

<p>I know it’s killing me haha</p>

<p>Does anybody remember whether or not there was a diagram? I might be imagining it</p>

<p>I thought it asked for one possible answer or maybe I’m think about the wrong question</p>

<p>@Cynosuree It was asking for the least possible positive integer value of d</p>

<p>Was it a grid in? I know it was the last question in one of the sections</p>

<p>It had a line going like this -----------------> With arrow at the end
With A-D from left to right, so I’m fairly sure the arrow implied that D would be greater than the others…</p>

<p>i am almost positive i remember there being a diagram with abcd on the line with d furthest right, therefore it would have to be 8 since they are all positive integers</p>

<p>Yeah the answer to that was 8</p>

<p>It would look like</p>

<p>–A----B–C-D—> (This was exactly how the diagram looked like)
0-1----5–7-8—> (would correspond with the correct answer)</p>

<p>@Michael: there was DEFINITELY a diagram.</p>