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missrochelle
- Master | Next Rank: 500 Posts
- Posts: 117
- Joined: Wed Jun 09, 2010 7:02 am
If c < 4, what is the range of possible values for d if 3c = -6d.
I tried to solve by isolating d: d = - 1/2 C
Then plugging in numbers for c:
C = then D =
3 -3/2
2 -1
1 -1/2.
Clearly this was wrong because it was an extreme value question where I was supposed to plug in "LT4) in the equation.
My question is how does one easily identify Extreme value questions? What wording should you look for and what flags might there be to tell you you're doing it wrong and SHOULD be using extreme value strategy?
*source: ManhattanGMAT Flashcards*
I tried to solve by isolating d: d = - 1/2 C
Then plugging in numbers for c:
C = then D =
3 -3/2
2 -1
1 -1/2.
Clearly this was wrong because it was an extreme value question where I was supposed to plug in "LT4) in the equation.
My question is how does one easily identify Extreme value questions? What wording should you look for and what flags might there be to tell you you're doing it wrong and SHOULD be using extreme value strategy?
*source: ManhattanGMAT Flashcards*
