number properties

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sud21: Master | Next Rank: 500 Posts; Posts: 344; Joined: Sat Nov 12, 2011 3:21 amFollowed by: 2 members; Thanked: 1 times

by sud21 » Sun Jan 15, 2012 2:29 am

If m and n are none negative integers, mn=?
1). 4^m=2^n
2). 3^m=2^n

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Source: Beat The GMAT — Data Sufficiency | Sun Jan 15, 2012 2:29 am

rijul007: Legendary Member; Posts: 588; Joined: Sun Oct 16, 2011 9:42 amFollowed by: 9 members; Location: New Delhi, India; Thanked: 130 times; GMAT Score:720

by rijul007 » Sun Jan 15, 2012 4:54 am

sud21 wrote:If m and n are none negative integers, mn=?
1). 4^m=2^n
2). 3^m=2^n

1). 4^m=2^n
2^2m = 2^n
2m = n

Insuff

2). 3^m=2^n
m = n = 0
mn = 0

Suff

Option B

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