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On GMAT data sufficiency, if a question feels obvious, pause; you are missing something. Recheck assumptions, test each statement alone, seek a unique, consistent conclusion, and scan for exceptions, corner cases, and domain limits. Read closely for nuances in wording and definitions before deciding sufficiency.
One of the most powerful lessons in GMAT Data Sufficiency is this: if a question feels too easy, it probably hides a trap. The GMAT is designed to test your reasoning skills, not just your ability to calculate. When you see a problem where the answer seems obvious, pause and look again. Chances are that you are overlooking something subtle but crucial. Take, for example, questions involving the highest common factor of multiple integers. At first glance, a missing variable may make the statement look insufficient. Many test-takers quickly dismiss it, marking the wrong option. But in reality, certain relationships within the given numbers may already force the outcome, regardless of the missing variables. This is where deeper thinking makes the difference. Our GMAT preparation course trains you to recognize such traps systematically. Alongside, our GMAT practice tests give you repeated exposure to these tricky patterns so that on test day, you are prepared for every surprise.
Consider the following GMAT Data Sufficiency question:
Question: What is the highest common factor (HCF) of four integers A, B, C, and D?
Statement 1: A = 27 and B = 49.
Statement 2: B and C have nothing in common.
A: Statement 1 alone is sufficient, but statement 2 alone is not.
B: Statement 2 alone is sufficient, but statement 1 alone is not.
C: Both statements together are sufficient, but neither alone is sufficient.
D: Each statement alone is sufficient.
E: Even both statements together are not sufficient.
At first glance, statement 1 appears insufficient because values of C and D are missing.
Similarly, statement 2 seems insufficient because A and D are missing.
Most students then combine the two and still feel that information is incomplete, concluding that the answer must be option E (not sufficient even after combining).
But here is the catch. If A = 27 and B = 49, they already share no common factor other than 1. No matter what C and D are, the overall HCF will be 1. Therefore, statement 1 alone is sufficient.
The same reasoning applies to statement 2. If B and C have nothing in common, their HCF is 1. This forces the HCF of A, B, C, and D also to be 1, regardless of A and D. Thus, statement 2 is sufficient as well.
The correct answer is D, not E.
If a Data Sufficiency problem feels too straightforward, you may be missing the hidden logic. Train yourself to pause and look for the deeper catch. This habit will save you from the most common traps and significantly improve your accuracy. For consistent practice with such patterns, our GMAT simulation provides invaluable training.
The GMAT reminds us that life’s toughest challenges rarely announce themselves loudly. More often, they come disguised as something simple, waiting for us to overlook the hidden detail. A question that feels “too easy” is a call to pause, think deeper, and respect the possibility of a trap. This habit of looking beyond the obvious is not only a safeguard on the test but also a lesson for decision-making in business school admissions and life. True clarity emerges when you slow down, question assumptions, and uncover the subtle truths that others miss.
