GMAT考试：Testprep数学精解2_GMAT数学

GMAT考试：Testprep数学精解2

　　Turning to ， we still cannot determine whether CAB is a code word since now we have no word to apply this rule to. This eliminates B.

　　However， if we consider and together， then we can determine whether

　　CAB is a code word：

　　From ， ABC is a code word.

　　From ， the C in the code word ABC can be moved to the front of the word：

　　CAB.

　　Hence， CAB is a code word and the answer is C.

　　UNWARRANTED ASSUMPTIONS

　　Be extra careful not to read any moresintosa statement than what is given.

　　The main purpose of some difficult problems is to lure yousintosmaking an unwarranted assumption.

　　If you avoid the temptation， these problems can become routine.

　　Example 6： Did Incumbent I get over 50% of the vote?

　　 Challenger C got 49% of the vote.

　　 Incumbent I got 25，000 of the 100，000 votes cast.

　　If you did not make any unwarranted assumptions， you probably did not find t　his to be a hard problem. What makes a problem difficult is not necessarily　its underlying complexity; rather a problem is classified as difficult if many people miss it. A problem may be simple yet contain a psychological trap that causes people to answer it incorrectly.