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If k is a positive integer, then k is defined as the product of all t

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If k is a positive integer, then k is defined as the product of all t  [#permalink]

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New post 25 Apr 2017, 06:21
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If k is a positive integer, then k@ is defined as the product of all the fractions of the form 1/S, where S is a positive integer not greater than k. What is the value of 5@/4@?

A. 1/5

B. 4/5

C. 1

D. 5/4

E. 5
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Re: If k is a positive integer, then k is defined as the product of all t  [#permalink]

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New post 25 Apr 2017, 06:29
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vikasp99 wrote:
If k is a positive integer, then k@ is defined as the product of all the fractions of the form 1/S, where S is a positive integer not greater than k. What is the value of 5@/4@?

A. 1/5

B. 4/5

C. 1

D. 5/4

E. 5


5@/4@ = (1/1)(1/2)(1/3)(1/4)(1/5)/(1/1)(1/2)(1/3)(1/4)
= 1/5

Answer:

Cheers,
Brent
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Re: If k is a positive integer, then k is defined as the product of all t  [#permalink]

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New post 01 May 2017, 08:27
GMATPrepNow wrote:
vikasp99 wrote:
If k is a positive integer, then k@ is defined as the product of all the fractions of the form 1/S, where S is a positive integer not greater than k. What is the value of 5@/4@?

A. 1/5

B. 4/5

C. 1

D. 5/4

E. 5


5@/4@ = (1/1)(1/2)(1/3)(1/4)(1/5)/(1/1)(1/2)(1/3)(1/4)
= 1/5

Answer:

Cheers,
Brent



**Hi, It said S can be less than or equal to K, so for @5 the value of S could be 1,2,3,4 or 5 and for @4 the value of S could be 1,2,3,4...so while calculating @5/@4 with value of S as 4 for @5 and similarly S=4 for @4 the answer would be 1...So there is lots of ambiguity in this question.
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Re: If k is a positive integer, then k is defined as the product of all t  [#permalink]

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New post 01 May 2017, 08:33
Top Contributor
IIMC wrote:
GMATPrepNow wrote:
vikasp99 wrote:
If k is a positive integer, then k@ is defined as the product of all the fractions of the form 1/S, where S is a positive integer not greater than k. What is the value of 5@/4@?

A. 1/5

B. 4/5

C. 1

D. 5/4

E. 5


5@/4@ = (1/1)(1/2)(1/3)(1/4)(1/5)/(1/1)(1/2)(1/3)(1/4)
= 1/5

Answer:

Cheers,
Brent



**Hi, It said S can be less than or equal to K, so for @5 the value of S could be 1,2,3,4 or 5 and for @4 the value of S could be 1,2,3,4...so while calculating @5/@4 with value of S as 4 for @5 and similarly S=4 for @4 the answer would be 1...So there is lots of ambiguity in this question.


But the questions say "....all the fractions of the form 1/S"

Cheers,
Brent
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Re: If k is a positive integer, then k is defined as the product of all t  [#permalink]

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New post 24 Jun 2018, 02:10
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Re: If k is a positive integer, then k is defined as the product of all t &nbs [#permalink] 24 Jun 2018, 02:10
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