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# If, what is the value of ab/c? (1) a = 3! 2! and c = 2! 1!

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VP
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If, what is the value of ab/c? (1) a = 3! 2! and c = 2! 1! [#permalink]

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13 Dec 2004, 01:30
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If, what is the value of ab/c?

(1) a = 3! â€“ 2! and c = 2! â€“ 1!

(2) b = 1! â€“ 0!
Intern
Joined: 12 Mar 2004
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13 Dec 2004, 02:51
Good question......Point to remember : 0! = 1! = 1

Hence, from (2) we know that b=0.

Therefore, ab/c is equal to zero.

from (1) we do not know the value of b and hence not sufficient

Ans: B
Director
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13 Dec 2004, 07:01
B. Same logic as above.
SVP
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27 Aug 2005, 21:58
MA wrote:
If, what is the value of ab/c?
(1) a = 3! â€“ 2! and c = 2! â€“ 1!
(2) b = 1! â€“ 0!

Good one, B too....
GMAT Club Legend
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27 Aug 2005, 23:01
From 1) we have:

a= (3x2x1) - (2x1) = (2x1)(3-1) = (2x1)(2)
c= (2x1)-1 = 1

ab/c = 4b and we can't arrive at a value. So (1) is not sufficient.

From (2), all we know is b = 1-1 = 0. If b=0, ab/c = 0.

27 Aug 2005, 23:01
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