Data Sufficiency questions

The Quantitative type of questions only test you on math concept.

Don’t waste time on solving

Answer the question correctly, you need to whether sufficient information is given. Remember you only have about one minute for each question (13-14 Data Sufficency included in the 37 quantitative questions for 75 minutes) . No calculations is required, so if you find yourself scratching calculus on paper , you’re in the wrong way. Everything is stated , don’t look for extra information.

Remember the question patterns

  • (A) Statement (1) ALONE is sufficient, but statement (2) alone is NOT sufficient
  • (B) Statement (2) ALONE is sufficient, but statement (1) alone is NOT sufficient
  • (C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
  • (D) EACH statement ALONE is sufficient
  • (E) Statement (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data are needed

Remember well this pattern, it’s the same for all along the test. At first consider each statement independently. Do statement (1) alone is sufficient to answer ? Same for (2) ? Then judge the statements in tandem.
If the two statements don’t provide enough, it’s only (C) and (E). In (C) you have information from both statement, don’t look for anything else. In (E) statements are unrelated to the question.
Now it’s possible, you answer Yes to (A) and (B) so pick up (D).
Some people mistake (C) and (D), if you answered NO to (A) & (B) then it’s definitely (C).

Example

Question

what is the value of xy – yz ?
(1) y=2
(2) x-z=5

Answer

(A) NO
(B) NO
xy – yz = y*(x-z) = statement (1)*(2)
=2*5=10 ( but remember we don’t calculation) . Calculation is a luxury here.
Both statement provide enough information in tandem. So it’s (C)

Questions

Well if you have unresolved questions or your strategies at taking this test. Please feel free to post them.

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