If it is true that z < 8 and 2z > -4, which of the following must be true?
A. -8 < z < 4
B. z > 2
C. z > -8
D. z < 4
E. None of the above
The OA is C.
Can I say, z < 8 and 2z < -4 = z < -2, then -2 < z < 8, right?
Only C is always true, as ANY z from the TRUE range, -2 < z < 8, will be greater than -8.
Experts, any suggestion about this PS question? Thanks in advance.
If it is true that z < 8 and 2z > -4, which of the fol
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I would have set it up the same way you did. You are correct in saying that -2 < Z < 8. Further you are correct in saying that C is true. Every possible value of Z is greater than -8.LUANDATO wrote:If it is true that z < 8 and 2z > -4, which of the following must be true?
A. -8 < z < 4
B. z > 2
C. z > -8
D. z < 4
E. None of the above
The OA is C.
Can I say, z < 8 and 2z < -4 = z < -2, then -2 < z < 8, right?
Only C is always true, as ANY z from the TRUE range, -2 < z < 8, will be greater than -8.
Experts, any suggestion about this PS question? Thanks in advance.
A) doesn't hold --> test z = 5
B) doesn't hold --> test z = 1
D) doesn't hold --> test z = 5
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Hi LUANDATO,LUANDATO wrote:If it is true that z < 8 and 2z > -4, which of the following must be true?
A. -8 < z < 4
B. z > 2
C. z > -8
D. z < 4
E. None of the above
The OA is C.
Can I say, z < 8 and 2z < -4 = z < -2, then -2 < z < 8, right?
Only C is always true, as ANY z from the TRUE range, -2 < z < 8, will be greater than -8.
Experts, any suggestion about this PS question? Thanks in advance.
Your conclusion, -2 < z < 8, is perfect.
So, if z is BETWEEN -2 and 8, then z must be greater than -8
Answer: C
Cheers,
Brent
GMAT/MBA Expert
- Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
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- Thanked: 5254 times
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- GMAT Score:770
Hi LUANDATO,LUANDATO wrote:If it is true that z < 8 and 2z > -4, which of the following must be true?
A. -8 < z < 4
B. z > 2
C. z > -8
D. z < 4
E. None of the above
The OA is C.
Can I say, z < 8 and 2z < -4 = z < -2, then -2 < z < 8, right?
Only C is always true, as ANY z from the TRUE range, -2 < z < 8, will be greater than -8.
Experts, any suggestion about this PS question? Thanks in advance.
Your conclusion, -2 < z < 8, is perfect.
So, if z is BETWEEN -2 and 8, then z must be greater than -8
Answer: C
Cheers,
Brent