Sequence S consists of 24 non-zero integers. If each term in S after the second is the product of previous two terms, how many terms in S are negative?
1) The third term in S is positive
2) The fourth term in S is negative
OA B
Sequence number...
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- albatross86
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We don't care about the value of the integers, only the signs. Let's denote Positive as P and Negative as N.
Statement 1:
3rd term is positive.
2 possibilities:
PPP... No negatives
NNP... Definitely some negatives
INSUFFICIENT
Statement 2:
4th term is negative
Two possibilities:
NPNNPNNPNNP... You can group them as 8 groups of (NPN) (NPN) (NPN)... => 16Negatives
or NNPNNPNNPNNP.... You can group them as 8 groups of (NNP) (NNP)... -> 16 Negatives
SUFFICIENT
Pick B.
Statement 1:
3rd term is positive.
2 possibilities:
PPP... No negatives
NNP... Definitely some negatives
INSUFFICIENT
Statement 2:
4th term is negative
Two possibilities:
NPNNPNNPNNP... You can group them as 8 groups of (NPN) (NPN) (NPN)... => 16Negatives
or NNPNNPNNPNNP.... You can group them as 8 groups of (NNP) (NNP)... -> 16 Negatives
SUFFICIENT
Pick B.
~Abhay
Believe those who are seeking the truth. Doubt those who find it. -- Andre Gide
Believe those who are seeking the truth. Doubt those who find it. -- Andre Gide