| View previous topic :: View next topic |
| Author |
Message |
maolivie
Rising GMAT Star
Joined: 13 Apr 2007
Posts: 80
Thanks given: 0
Thanked 0 times in 0 posts
Location: Long Island
|
 Posted: Thu Jul 05, 2007 5:46 pm Post subject: Gmatprep exponents |
 |
|
(2^(4-1)^2)/(2^(3-2))
1- 2^8
2- 2^7
3-2^6
4-2^5
2-2^4
I keep getting 2^6, OA is 2^8, can someone please clarify or let me know what I am doing wrong. PEMDAS right?
_________________
http://www.AccuInvestor.com - my site! |
|
| Back to top |
|
 |
|
|
thumpin_termis
Rising GMAT Star
Joined: 01 Jun 2007
Posts: 60
Thanks given: 0
Thanked 0 times in 0 posts
|
| Posted: Thu Jul 05, 2007 6:11 pm Post subject: |
|
|
The main point here is that:
2^3^2 is NOT equal to (2^3)^2
1. 2^3^2 = 2^9
2. (2^3)^2 = 2^6
If you see that, then it's
(2^3^2) / 2^1 = 2^9 / 2 = 2^8 |
|
| Back to top |
|
|
maolivie
Rising GMAT Star
Joined: 13 Apr 2007
Posts: 80
Thanks given: 0
Thanked 0 times in 0 posts
Location: Long Island
|
| Posted: Thu Jul 05, 2007 6:23 pm Post subject: |
|
|
ahh interesting, I didn't see that at first.
Thanks.
_________________
http://www.AccuInvestor.com - my site! |
|
| Back to top |
|
|
|
