BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

GMAT Prep: Exp

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 158
Joined: Mon Dec 03, 2007 8:32 am
Thanked: 7 times

by StarDust845 » Thu Dec 27, 2007 2:36 pm
n must be 21.

4^11 = 2 ^ 22.

and the 21 5s can be paired up with 21 2s to give 21, 10s.

Hence the 5^21 = 2 * 10^21 hence n = 21.

Calista
Last edited by StarDust845 on Thu Dec 27, 2007 3:37 pm, edited 1 time in total.
Top
Senior | Next Rank: 100 Posts
Posts: 78
Joined: Thu Dec 06, 2007 4:16 pm
Location: NYC, NY
Thanked: 2 times

by preciousrain7 » Thu Dec 27, 2007 3:25 pm
StarDust845 wrote:n must be 21.

4^11 = 2 ^ 22.

and the 51 5s can be paired up with 21 2s to give 21, 10s.

Hence the 5^21 = 2 * 10^21 hence n = 21.

Calista
CALISTA, THANK YOU VM!!!!
Top
Post new topic Post Reply
• Page 1 of 1