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15 Jul 2025, 19:42
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Hey GMATClub community,
When you're working through a Data Sufficiency question, and you suspect a statement is INSUFFICIENT, what's your most effective and quickest way to prove it?
Do you immediately:
A) Look for two different numerical examples that satisfy the statement but give different answers to the question?
B) Analyze the underlying mathematical principle to see if multiple solutions are inherently possible?
C) Consider boundary cases (e.g., zero, negative, fractions, large numbers)?
D) Try to simplify the statement to see if it leads to an equation with more than one variable or solution?
E) Other (please share your method below!)
Your efficiency tips could really help others !
When you're working through a Data Sufficiency question, and you suspect a statement is INSUFFICIENT, what's your most effective and quickest way to prove it?
Do you immediately:
A) Look for two different numerical examples that satisfy the statement but give different answers to the question?
B) Analyze the underlying mathematical principle to see if multiple solutions are inherently possible?
C) Consider boundary cases (e.g., zero, negative, fractions, large numbers)?
D) Try to simplify the statement to see if it leads to an equation with more than one variable or solution?
E) Other (please share your method below!)
Your efficiency tips could really help others !
15 Jul 2025, 23:21
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It is a tricky question as sometimes there are different approaches, but it is a good question you are asking.
There are easy questions and hard ones, so sometimes the strategy is different where you start. If you have an example of 2-3 questions that may help get much more hands on experience/feedback (I am curious what others think).
I would usually START with plugging in some simple numbers - e.g. 2 and 3 or 4 and 3 and then if both work, I would check again with a zero, fraction, or negative fraction, and make sure it is integers and not any number type of thing.
I found that plugging in numbers was the most reliable method for me than solving equations.
There are easy questions and hard ones, so sometimes the strategy is different where you start. If you have an example of 2-3 questions that may help get much more hands on experience/feedback (I am curious what others think).
I would usually START with plugging in some simple numbers - e.g. 2 and 3 or 4 and 3 and then if both work, I would check again with a zero, fraction, or negative fraction, and make sure it is integers and not any number type of thing.
I found that plugging in numbers was the most reliable method for me than solving equations.
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