5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
20k
This topic has expert replies
-
ssmiles08
- Master | Next Rank: 500 Posts
- Posts: 472
- Joined: Sun Mar 29, 2009 6:54 pm
- Thanked: 56 times
1) Examples we can choose here: 2 and 3.
if k = 2.
20*2 = 40 is divisible by 8 possible numbers. 2^3*5^1 = (4)(2) = 8.
if k = 3.
20*3 = 60
60 is divisible by 12 possible numbers. 2^2*3*5 = (3)(2)(2) = 12.
Insufficient.
2) k = 7
20*7 = 140
140 is divisible by 12 factors. 2^2*5*7 = (3)(2)(2) = 12. Sufficient.
IMO B.
if k = 2.
20*2 = 40 is divisible by 8 possible numbers. 2^3*5^1 = (4)(2) = 8.
if k = 3.
20*3 = 60
60 is divisible by 12 possible numbers. 2^2*3*5 = (3)(2)(2) = 12.
Insufficient.
2) k = 7
20*7 = 140
140 is divisible by 12 factors. 2^2*5*7 = (3)(2)(2) = 12. Sufficient.
IMO B.
You got a dream... You gotta protect it. People can't do somethin' themselves, they wanna tell you you can't do it. If you want somethin', go get it. Period.
-
vikram_k51
- Master | Next Rank: 500 Posts
- Posts: 208
- Joined: Sat Jan 31, 2009 11:32 am
- Location: Mumbai
- Thanked: 2 times
