Notice in the above example that the triangle appears to be a right triangle
However, that cannot be assumed: angle A may be 89 degrees or 91 degrees,we cant tell from the drawing. You must be very careful not to assume any more than what is explicitly given in a Data Sufficiency problem.
ELIMINATION
Data Sufficiency questions provide fertile ground for elimination. In fact,it is rare that you wont be able to eliminate some answer-choices. Remember, if you can eliminate at least one answer choice, the odds of gaining points by guessing are in your favor.
The following table summarizes how elimination functions with Data Sufficie
Statement Choices Eliminated is sufficient B, C, E is not sufficient A, D is sufficient A, C, E is not sufficient B, D is not sufficient and is not sufficient A, B, D
Example 1: What is the 1st term in sequence S?
The 3rd term of S is 4.
The 2nd term of S is three times the 1st, and the 3rd term is four times the 2nd.is no help in finding the first term of S. For example, the following sequences each have 4 as their third term, yet they have different first terms:
0, 2, 4
-4, 0, 4
This eliminates choices A and D. Now, even if we are unable to solve this problem, we have significantly increased our chances of guessing correctlyfrom 1 in 5 to 1 in 3.
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