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If s is the product of the integers from 100 to 200 inclusiv

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If s is the product of the integers from 100 to 200 inclusiv [#permalink] New post 25 Oct 2007, 16:13
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Question Stats:

61% (02:25) correct 38% (01:47) wrong based on 26 sessions
If s is the product of the integers from 100 to 200 inclusive, and if t is the product of the integers from 100 to 201 inclusive, what is 1/s + 1/t in terms of t?

A. 201^2/t
B. 202*201/t
C. 201/t
D. 202/t
E. 202*201/t^2
[Reveal] Spoiler: OA

Last edited by Bunuel on 18 Feb 2014, 01:21, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Re: PS - Algebra [#permalink] New post 25 Oct 2007, 18:10
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yuefei wrote:
IF s is the product of integers from 100 to 200, inclusive, and t is the product of integers from 100 to 201, inclusive, what is 1/s + 1/t in terms of t?

A. (201)^2 / t
B. [(202)(201)]/t
C. 201/t
D. 202/t
E. [(202)(201)]/t^2


D

s = 100*...*200
t = 100*...*200*201
This means
s = t/201
Therefore,
1/s + 1/t = 201/t + 1/t = 202/t
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 [#permalink] New post 25 Oct 2007, 21:06
I get D..

s=100*...200
t=100*...201, basically t=201*s

s=t/201

1/s=201/t

201/t + 1/t= 202/t
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Re: PS - Algebra [#permalink] New post 26 Oct 2007, 00:41
yuefei wrote:
IF s is the product of integers from 100 to 200, inclusive, and t is the product of integers from 100 to 201, inclusive, what is 1/s + 1/t in terms of t?

A. (201)^2 / t
B. [(202)(201)]/t
C. 201/t
D. 202/t
E. [(202)(201)]/t^2


D.

t = 201s or s = t/201

1/s + 1/t = 201/t + 1/t = 202/t
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Re: IF s is the product of integers from 100 to 200, inclusive, [#permalink] New post 17 Feb 2014, 09:29
Hi,
Please add the OA.
thanks.
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Re: IF s is the product of integers from 100 to 200, inclusive, [#permalink] New post 18 Feb 2014, 01:22
Expert's post
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Re: If s is the product of the integers from 100 to 200 inclusiv [#permalink] New post 04 Mar 2014, 21:47
Answer = D

s = 100*...*200
t = 100*...*200*201
t = s * 201

So, s = t/201 & 1/s = 201/t

Therefore,

1/s + 1/t = 201/t + 1/t = 202/t
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Re: If s is the product of the integers from 100 to 200 inclusiv   [#permalink] 04 Mar 2014, 21:47
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