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1-3MATH JJ

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发表于 2003-3-3 20:17:00 | 只看该作者

1-3MATH JJ



 
——转自GR

Math is not difficult, but got a suck score at verbal. sigh.......anyway, here are some JJ today. hope can help others.

1. Is X<0?
a.) X^3 < 0
b.) X^2+X+1 =0

2. root^4 [(X-3)^4] + root[ -x|X|] = ? *Update: X < 0

3. A can finish job at X hours, B takes twice the time A need, ask how much hours to finish the job with A & B work together.

one old jj.

1. Which one equal to 5000? => d.) 3/0.0006

2. one person running around a circle, after 300feet return to the start point, ask how much is the radius?

I.) 150/pei
II.) 60/Pei
III.) 25/pei

=> I.III

I will post others if i remember.. good luck.







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