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Re: If R, S, and T are points on a line, and if R is 5 meters from T and 2
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27 Apr 2019, 06:11
Bunuel wrote:
If R, S, and T are points on a line, and if R is 5 meters from T and 2 meters from S, how far is S from T ?
(1) R is between S and T. (2) S is to the left of R, and T is to the right of R.
DS04602.0 OG2020 NEW QUESTION
We know that \(RT=5\) and \(RS=2\). The original question: \(ST=?\)
1) We know that \(R\) is between \(S\) and \(T\). It doesn't matter whether \(S\) is to the left of \(T\) or \(S\) is to the right of \(T\) since \(ST=RT+RS=5+2=7\) in both cases. Thus, the answer to the original question is a unique value. \(\implies\) Sufficient
2) We can infer that \(R\) is between \(S\) and \(T\), so \(ST=7\) again. Thus, the answer to the original question is a unique value. \(\implies\) Sufficient
Re: If R, S, and T are points on a line, and if R is 5 meters from T and 2
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29 Apr 2019, 10:07
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Top Contributor
Bunuel wrote:
If R, S, and T are points on a line, and if R is 5 meters from T and 2 meters from S, how far is S from T ?
(1) R is between S and T. (2) S is to the left of R, and T is to the right of R.
Given: R, S, and T are points on a line, and if R is 5 meters from T and 2 meters from S There are 4 possible scenarios that meet the above conditions:
Target question:How far is S from T?
Statement 1: R is between S and T. When we check the 4 possible scenarios, we see that scenarios #2 and #3 meet the conditions of statement 1 For both scenarios, the answer to the target question is the distance from S to T is 7 Since we can answer the target question with certainty, statement 1 is SUFFICIENT
Statement 2: S is to the left of R, and T is to the right of R. When we check the 4 possible scenarios, we see that only scenario #2 meets the conditions of statement 2 For scenario #2, the answer to the target question is the distance from S to T is 7 Since we can answer the target question with certainty, statement 2 is SUFFICIENT
Re: If R, S, and T are points on a line, and if R is 5 meters from T and 2
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06 May 2019, 20:14
Bunuel wrote:
If R, S, and T are points on a line, and if R is 5 meters from T and 2 meters from S, how far is S from T ?
(1) R is between S and T. (2) S is to the left of R, and T is to the right of R.
DS04602.0 OG2020 NEW QUESTION
We are given the distance from R to T and from R to S; and we need to determine the distance from S to T. To be able to determine the distance from S to T, we need to know in what order R, S and T are positioned on the line.
Statement One Alone:
R is between S and T. Since R is between S and T, the distance between S and T is equal to the sum of the distances from R to T and from R to S. Since we are given both of those distances, we have enough information to calculate the distance from S to T. Statement one alone is sufficient.
Eliminate answer choices B, C and E.
Statement Two Alone:
S is to the left of R, and T is to the right of R.
Notice that this could only happen if R is between S and T. If R is not between S and T, either both S and T are to the left of R or both S and T are to the right of R. Since we know R is between S and T, we can proceed as in the previous statement to calculate the distance between S and T. Statement two alone is sufficient.
Re: If R, S, and T are points on a line, and if R is 5 meters from T and 2
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21 May 2019, 16:10
Hi All,
We're told that R, S, and T are points on a line, R is 5 meters from T and R is 2 meters from S. We're asked for the distance between S and T. This question can be solved with a bit of logic and Arithmetic (and you might find it helpful to draw some actual number lines).
(1) R is between S and T.
With the information in Fact1, we know that R is somewhere between S and T. Regardless of where you place those 3 values on a number line, since R is 5 meters from S and 2 meters from T, then the line ST will be exactly 5+2 = 7 meters in length. Fact 1 is SUFFICIENT
(2) S is to the left of R, and T is to the right of R.
The information in Fact 2 takes the information that's in Fact1 and 'restricts' it a bit more (placing S to the 'left' and T to the 'right' - relative to R's position - on the number line. The deduction that we made in Fact1 also applies to Fact2. ST will be exactly 5+2 = 7 meters in length. Fact 2 is SUFFICIENT
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92% (01:06) correct 
