15² − 63² + 27² − 22² + (54)(15) + (44)(63) =
A) 53
B) 83
C) 91
D) 93
E) 105
Source: www.gmatprepnow.com
Answer: B
Difficulty level: 650-700
15² − 63² + 27² − 22² + (54)(15) + (44)(63) =
This topic has expert replies
GMAT/MBA Expert
- Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
- Joined: Mon Dec 08, 2008 6:26 pm
- Location: Vancouver, BC
- Thanked: 5254 times
- Followed by:1268 members
- GMAT Score:770