What's the fastest way to do these math problems?

Mde
Sat, 26 Sep 2009 22:38:39 +0000

In the figure here ImageShack - Best place for all of your image hosting and image sharing needs; line l is parallel to line m. If v = 2w, which of the following must be equal to q?


A. v + t
B. v - t
C. t
D. 2v
E. s + t

This you probably could’ve done it faster just eliminating (and i rarely say this for any problem… unless it said not drawn to scale). Rather than giving numbers to the variables…V+T=180 (a is out), v=q so subtracting would only make it less(b is out), t is less than q (c is out), 2v=s which is less than q(d is out), S+t is only one left and is the only one numerically possible to equal q… this would’ve taken 10-15 seconds rather than having to crunch down the numbers and then apply numbers to the problem when you just apply variables just looking at it.

You could try option1+option2+neither-both=total:
200+80+0(since it didn’t say no one did nothing)-x=240
280-x=240
x=40

I’m not really sure why it said least… what answer choices would this requirement have eliminated? All in all i’m not sure what this question actually asks for and just thoguht maybe that formula would help.