Challenge Problem Showdown

Manhattan GMAT invites you to test your GMAT knowledge for a chance to win! Each week, we will post a new Challenge Problem for you to attempt. If you submit the correct answer, you will be entered into that week’s drawing for a free Manhattan GMAT Prep item. The value of the item increases as more people enter the contest so tell your friends to get out their scrap paper and start solving!


Good luck! These are tough problems!

This Week's Problem: "Replacement Scheme"

x is replaced by 1 – x everywhere in the expression 1/x – 1/(1 – x), with x ≠ 0 and x ≠ 1. If the result is then multiplied by x2 – x, the outcome equals

(A) x + 1
(B) x – 1
(C) 1 – x2
(D) 2x – 1
(E) 1 – 2x

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Weekly Prizes

Each week, we will draw a name from all of the correct answer submissions. The winner will receive the appropriate prize from the list below based on the total number of entries. The more people who enter, the better the reward!


EntriesPrize
0-99One (1) Manhattan GMAT Strategy Guide ($26 value)
100-249Two (2) Manhattan GMAT Strategy Guides ($52 value)
250-499All Eight (8) Manhattan GMAT Strategy Guides ($208 value)
500+The Complete Prep Set
($280 value)