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Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
In sequence X, term_1 = 3, term_2 =7, term_3 = 15,
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10 Aug 2022, 06:23
10 Aug 2022, 06:23
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In sequence X, \(t_1 = 3\), \(t_2 =7\), \(t_3 = 15\), and \(t_4 = 31\)
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
\(t_5\) of sequence X |
\(63\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: In sequence X, term_1 = 3, term_2 =7, term_3 = 15,
[#permalink]
13 Aug 2022, 07:30
13 Aug 2022, 07:30
2
GreenlightTestPrep wrote:
In sequence X, \(t_1 = 3\), \(t_2 =7\), \(t_3 = 15\), and \(t_4 = 31\)
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
\(t_5\) of sequence X |
\(63\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
I created this question to highlight the fact that the GRE does not test our ability to find missing terms in a sequence unless the sequence is defined for us.
The reason is that there's no way that we can definitively determine ONE (and ONLY ONE) pattern in a given sequence.
Consider this example: 1, 2, 4, __
What's the missing term here?
Well, if we read the sequence as doubling from one term to the next, the next term is 8
HOWEVER, if we notice that we keep adding successively larger integers to each term (i.e., add 1, then add 2, then add 3, etc.) the next term is 7
Likewise, (if we want to get a bit silly), we might look at the given sequence (5, 10, 15, 20, 25, __) and say that the next term is 88. Why?
Because 5 is my favorite number, 10 is my 2nd favorite number, 15 is my 3rd favorite number, ... and 88 is 6th favorite number.
So, although you might have found a certain pattern in the sequence (double and add 1), we can't be certain that this is THE pattern.
This means t_5 can have ANY numeric value.
Answer: D
Re: In sequence X, term_1 = 3, term_2 =7, term_3 = 15,
[#permalink]
20 Oct 2024, 05:17
20 Oct 2024, 05:17
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
