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030 GRE Geometry similiar triangles

karush

Well-known member
Jan 31, 2012
2,620
Wahiawa, Hawaii
View attachment 9548
This seems to be rather common GRE Exam Question
Which appears to harder that what it is
It looks like a similar triagle solution
$\dfrac{800}{7000}=\dfrac{x}{1400}$
 
Last edited:

tkhunny

Well-known member
MHB Math Helper
Jan 27, 2012
268
PA, USA
This seems to be rather common GRE Exam Question
Which appears to harder that what it is
It looks like a similar triagle solution
$\dfrac{800}{7000}=\dfrac{x}{1400}$
800/7000 = x/1400

It's a little bit of smoke.

80/700 = x/1400

8/70 = x/1400

8/7 = x/140

8/1 = x/20

Look easier?

Anyone whose first move is to produce 112,000 = 700x simply isn't paying attention.
 

HallsofIvy

Well-known member
MHB Math Helper
Jan 29, 2012
1,151
"Anyone whose first move is to produce 112,000 = 700x" solves problems like this by immediately plugging numbers into a calculator!