備考GMAT訣竅:掌握兩分鐘原則!
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May 17, 2012 by Hello US編輯室


Photograph by Jeffrey Coolidge/Getty Images

§ 原創翻譯:www.HelloUS.com §

GMAT的數學考題可以在兩分鐘內被解決!
GMAT考試並非真的需要知道你在數學方面的計算能力,而是要測出你的數學直覺。
如果你需要花五分鐘才能計算出一個問題的答案,無疑會浪費許多時間,你應該盡量減少或消除需要詳盡計算的必要。

怎麼做呢? 方法比你想像的還要簡單。

例如,想像一下,當你被問到123×341,答案的選擇是:
A/ 40,816
B/ 41,943
C/ 42,637
D/ 42,755
E/ 43,321

先別只是做計算。停下來思考,看一下答案其實就在選項裡。
把341的最後一個數字乘以123的最後一個數字,你會得到3×1,或3。不論答案是什麼尾數一定是3,幸運的話,只有一個選項的尾數是3,因此正確答案是B。

此為Sean Selinger所分享的GMAT考試訣竅,Sean Selinger在1999創辦800score網站,專門提供GRE與GMA的備考服務。

資料來源:businessweek

§ 原創翻譯:www.HelloUS.com §

GMAT Tip: The Two Minute Rule

The GMAT Tip of the Week is a weekly column that includes advice on taking the Graduate Management Admission Test, which is required for admission to most business schools. Every week an instructor from a top test prep company will share suggestions for improving your GMAT score. This week’s tip comes from Sean Selinger, founder of 800Score.

GMAT math questions can all be solved in two minutes or less. The GMAT doesn’t have a built-in calculator and doesn’t want to measure how good you are at basic math calculations. It wants to measure your math intuition. If it looks as if you need to do five minutes of calculations to solve the question, you are likely missing a shortcut. You should probably try to reduce or eliminate the need for exhaustive calculations.

How? It’s simpler than you think. Imagine, for example, a question that asks you to multiply 123 × 341. The answer choices are: A/ 40,816 B/ 41,943 C/ 42,637 D/ 42,755 E/ 43,321.

Don’t just do the calculation. Stop and think. Take a look at the answer choices. Multiply the last digit in 123 by the last digit in 341. You get 3 x 1, or 3. Whatever the answer is, it has to end in 3. As luck would have it, only one answer choice ends in 3. The correct answer is B.

Sean Selinger is the founder of 800score, a test prep service for the GRE and GMAT since 1999. Selinger graduated from Cornell University and scored above the 99th percentile on the SAT and the GMAT.
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