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Is k positive? (1) k is between -2 and 3 on the number line. (2) k is

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Bunuel
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Is k positive? (1) k is between -2 and 3 on the number line. (2) k is [#permalink] New post  06 Jun 2019, 07:20
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Is k positive?

(1) k is between -2 and 3 on the number line.
(2) k is between 1 and 2 on the number line.
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BrentGMATPrepNow
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Re: Is k positive? (1) k is between -2 and 3 on the number line. (2) k is [#permalink] New post  06 Jun 2019, 07:30
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Bunuel wrote:
Is k positive?

(1) k is between -2 and 3 on the number line.
(2) k is between 1 and 2 on the number line.


Target question: Is k positive?

Statement 1: k is between -2 and 3 on the number line.
Let's TEST some values.
There are several values of k that satisfy statement 1. Here are two:
Case a: k = 1. In this case, the answer to the target question is YES, k IS positive
Case b: k = -1. In this case, the answer to the target question is NO, k is NOT positive
Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT

Statement 2: k is between 1 and 2 on the number line.
In other words, k = 1.something
If k = 1.something, then the answer to the target question is YES, k IS positive
Since we can answer the target question with certainty, statement 2 is SUFFICIENT

Answer: B

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Brent
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GmatPrime
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Re: Is k positive? (1) k is between -2 and 3 on the number line. (2) k is [#permalink] New post  06 Jun 2019, 07:31
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St 2 alone sufficient

option B
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Re: Is k positive? (1) k is between -2 and 3 on the number line. (2) k is [#permalink] New post  06 Jun 2019, 07:57
Bunuel wrote:
Is k positive?

(1) k is between -2 and 3 on the number line.
(2) k is between 1 and 2 on the number line.


#1
insufficient as k can be - or +
#2
k has to be +ve
IMO B
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Kinshook
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Re: Is k positive? (1) k is between -2 and 3 on the number line. (2) k is [#permalink] New post  23 May 2020, 08:00
Bunuel wrote:
Is k positive?

(1) k is between -2 and 3 on the number line.
(2) k is between 1 and 2 on the number line.


Asked: Is k positive?

(1) k is between -2 and 3 on the number line.
If k = -1; NO
But if k=1; YES
NOT SUFFICIENT

(2) k is between 1 and 2 on the number line
0<1<k<2
k>0
SUFFICIENT

IMO B
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Re: Is k positive? (1) k is between -2 and 3 on the number line. (2) k is [#permalink]
23 May 2020, 08:00
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