GMAT Critical Reasoning - June is Taller Than Kristin. Letty is Taller Than Maria.

Question: June is taller than Kristin.
Letty is taller than Maria.
Maria is shorter than Nancy.
Kristin and Nancy are exactly the same height.
If the information above is true, which of the following must also be true?

1. Letty is taller than Nancy.
2. Letty is taller than June.
3. Kristin is shorter than Letty.
4. June is taller than Maria.
5. Kristin is shorter than Maria.

“June is taller than Kristin.” - is a GMAT critical reasoning topic. This GMAT critical comes with five options and candidates need to choose the one which is correct. GMAT critical reasoning tests the logical and analytical skills of the candidates. To answer the question, a candidate can either find a piece of evidence that would weaken the argument or have logical flaws in the argument.  Candidates get 65 minutes to answer 36 MCQ questions in the critical reasoning section of the GMAT.

Answer: D
Explanation: the given condition states that-
June is taller than Kristin.
Letty is taller than Maria.
Maria is shorter than Nancy.
Kristin and Nancy are exactly the same height
In order to find which one of the given options are true, the first way is to identify these given conditions through a number line. It can be seen that people on the left are taller than the people who are on the right such that-
Let, June be J; Krishtin be K; Letty be L; Maria be M; Nancy be N
Accordingly, the left people are taller than the right people-
J —-------------- K = N
L-------M
N-------M
Now, the position of N with respect to L cannot be determined so it can be any of the following cases.
J--------K=N-----L----M
or
J-----L----K=N-----M
Since, these cannot be said for sure, one of the cases which can be surely stated is that June is taller than Kristin and Nancy. This is because Kristin and Nancy have the same height. However, considering that
Nancy is taller than Maria as well as Kristin in that case, it can be assured that June is taller than Maria.
Hence, June being taller than Maria is the only case which can be determined to be true therefore, option D being the correct answer.

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