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If the operation # is one of the four arithmetic operations

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If the operation # is one of the four arithmetic operations [#permalink]

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New post 10 May 2010, 09:32
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If the operation # is one of the four arithmetic operations- addition, subtraction, multiplication and division. Is (6#2)#4= 6#(2#4)

(1) 3#2 > 3

(2) 3#1 = 3
[Reveal] Spoiler: OA

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Re: DS3 [#permalink]

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New post 10 May 2010, 13:58
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If the operation # is one of the four arithmetic operations- addition, subtraction, multiplication and division. Is (6#2)#4= 6#(2#4)

(1) 3#2 > 3, # can be either multiplication or addition in BOTH cases (6#2)#4 = 6#(2#4) is true: (6*2)*4=6*(2*4)=48 and (6+2)+4=6+(2+4)=12. Sufficient.

(2) 3#1 = 3, # can be either multiplication or division. If it's division the the answer to the question is No and if it's multiplication answer to the question is YES. Two different answers. Not sufficient.

Answer: A.
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Newbie: Determine Arithmetic Operation [#permalink]

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New post 05 Jan 2012, 12:03
Hi, everyone, I am new to the forum. After reading the "read this first" posts, I didn't find the post format template so I am just following my lab report format. If it is too off, please let me know!

Question:
If ° represents one of the operations +, –, and ×, is (6 ° 2) ° 4 = 6 ° (2 ° 4) ?
(1) 3 ° 2 > 3
(2) 3 ° 1 = 3

My logic:
For (1) alone, ° can either be + or *. For either case, the equation stands. Therefore, (1) is sufficient.

For (2) alone, ° must be *. In that case, the equation stands as well. Therefore, (2) is sufficient as well.

Thus, each statement alone is sufficient.

Yet, the answer key is telling me A is the right now. I am confused.


Thanks in advance for your help!
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Re: Newbie: Determine Arithmetic Operation [#permalink]

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New post 05 Jan 2012, 12:37
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alwaystravel wrote:
Hi, everyone, I am new to the forum. After reading the "read this first" posts, I didn't find the post format template so I am just following my lab report format. If it is too off, please let me know!

Question:
If ° represents one of the operations +, –, and ×, is (6 ° 2) ° 4 = 6 ° (2 ° 4) ?
(1) 3 ° 2 > 3
(2) 3 ° 1 = 3

My logic:
For (1) alone, ° can either be + or *. For either case, the equation stands. Therefore, (1) is sufficient.

For (2) alone, ° must be *. In that case, the equation stands as well. Therefore, (2) is sufficient as well.

Thus, each statement alone is sufficient.

Yet, the answer key is telling me A is the right now. I am confused.


Thanks in advance for your help!


If you are referring to question in the screenshot then you missed division (not mentioned in the typed question) which is true for statement 2 and hence insuff

if division was not mentioned then 2 would be suff as well....

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Re: Newbie: Determine Arithmetic Operation [#permalink]

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New post 05 Jan 2012, 13:48
Wow, and I wonder why I can't get it right? Thanks so much!

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Re: If the operation # is one of the four arithmetic operations [#permalink]

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New post 18 Jan 2016, 04:34
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Re: If the operation # is one of the four arithmetic operations [#permalink]

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New post 26 Aug 2017, 11:13
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: If the operation # is one of the four arithmetic operations   [#permalink] 26 Aug 2017, 11:13
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