<p>hahahaah .. same here... I first tried some really complicated method and got a fraction... Then started plugging in... If i remember correctly, the answer was 16</p>
<p>EDIT : or i think the answer was 4 since (x+Y)^2 =16... dont remember.</p>
<p>EDIT2: or maybe im thinking of another question... what did you get for answer?</p>
<p>the 1111 was actually quite easy. if you noticed, you divide the first equation by the second equation and you get xy. the x's cancel out. so basically its only the first equation of 5555 divided by the second of 5, and voila, 1111.</p>
<p>the pentagon is 36.</p>
<p>hmm .. thats funny, I got 10 as the answer</p>
<p>(7+3)^2 - (7-3)^2=84
100-16=84
84=84</p>
<p>7 + 3 = 10
I put A.10 as my answer .....</p>
<p>ahhh yeah.. I got 10... I squared 4 to get 16 and then added it to 84 to equal 100... then took the sqrt of that..</p>
<p>essetnailly, rewrote equation like this A^2= 84+(b)^(2)
where A was x+y and B was x-y</p>
<p>the answer isnt 16. it was (x+y)^2 - (x-y)^2=84</p>
<p>and solve for (x+y) if x and y are integers.</p>
<p>what you do is find a number for (x+y) that makes (x-y) therefore an integer. there was only one case. which is x+y=10. 100 - (x-y)^2=84 so (x-y)^2 is equal to 16, which makes x-y equal to 4, an integer. If you wanted to dig deeper, x=7 and y=3. so x+y = 10, which is the answer.</p>
<p>ahh didnt see you guys post it my bad</p>
<p>another one that took me a while was the one with the square inscribed in a circle ...... it was like number 3 on section 2 (math) - because it was like one of the first problems i knew it was easy.. .but i just could not figure it out ... later i was told that the answer was 6 because no matter how u position the diameter, it will always be equal to the side of the squre (which was 6) .. i got 6 as well, but it took me a while and was getting me very frustrated</p>
<p>damn.... I chose 6.5 .... </p>
<p>I took the area of square = area of circle
S^2= (PI)r^2
r= sqrt of 36/pi and got 6.7 so I figured 6.5</p>
<p>lol, my teacher showed me that a while ago, so i had it easy. i didnt know teachers actually helped ;)</p>
<p>you know, i may sound stupid, but what was annoying was on the CR section, there was one question that asked about what a word meant. I forget, it was controlled explosions. I couldn't decide between whether it meant "regulated" or "conducted". They both seemed the same and would fit right. I put regulated in the end cuz it seemed to be a more specific version of conducted, and that they wanted to imitate an explosion correctly, even though I hear both of them used quite often.</p>
<p>I chose regulated.</p>
<p>if you think about it, the 2 ends of the circle touch the 2 sides of the square. If you drew a straight diameter down instead of the purposely confusing one they gave you, its still the same as the length of the square.</p>
<p>its alright ....... I wish I can remember more problems ..... what didu get for the one that said the area of the cube was 49 ...... what was the total number for the length of the sides...??</p>
<p>lol... i put conducted ... but it was a toss up ... since it was explaining how the scientists controlled the experiment... I believed conducted sounded a little better..
jai could be right though</p>
<p>thank you, that makes me feel better :)</p>
<p>jai, the circle was inscribed, so basically the square is the area of the circle plus those 4 little pieces the circle cut off. how can they be equal in area :)</p>
<p>i put regulated too, but what was the answer the the question with the circle, radii, and arc? 2 of my friends and I put D, one reasoning so because it was the only answer with a pi in it. Wasn't E a pretty large answer? grr i hope I got it right, already 2 wrong for me :( .</p>
<p>ok 49, so each edge is 7. there are in total 12 edges. 7 * 12 = 84.</p>
<p>the circle one was definitely E, i plugged numbers in.</p>
<p>E is the right answer. the proportions of the small circle's arc is equal to the large circle. You take the diameter of both circles, find the circumference, times the angle (which is unknown, lets say X) over 360 and make that equal to the arc length. you would get 2 equations and get to E.</p>
<p>Is anyone positive on the one with the circle, radii and arc? One choice was like 3-r/r and that one had pi in it. The other didn't have pi. I think i picked the one without pi. Does anyone know for sure?</p>
<p>ummm . no .... based on my numbers .. ( I made r=3 or something ) .... D was like 9.2 and E was like 9.6 .... it seriously was a toss up - I choose the slightly bigger number (and the one without the pi sign because I think it was meant to confuse and make people pick it ie. Joe Blog answer) .... I could be wrong though</p>