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A trailer carries 3, 4 and 5 crates on a trip. Each crate we

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A trailer carries 3, 4 and 5 crates on a trip. Each crate we [#permalink] New post 09 Jan 2013, 12:33
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Question Stats:

25% (01:01) correct 75% (01:16) wrong based on 4 sessions
A trailer carries 3, 4 and 5 crates on a trip. Each crate weighs no less than 125 kg. What is the maximum weight of the crates on a single trip?

A. 1250
B. 625
C. 600
D. 7500
E. 375
[Reveal] Spoiler: OA
Magoosh GMAT Instructor
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Re: a trailer carries 3,4 and 5 crates on a trip.each crate weig [#permalink] New post 09 Jan 2013, 14:10
Expert's post
chiccufrazer1 wrote:
A trailer carries 3, 4 and 5 crates on a trip. Each crate weighs no less than 125 kg. What is the maximum weight of the crates on a single trip?
A. 1250
B. 625
C. 600
D. 7500
E. 375

Dear chiccufrazer1
Something seems deeply flawed with this question. You say: "Each crate weighs no less than 125 kg" --- that is, each create has a weight of 125 kg or more, up to infinity. We have 3 or 4 or 5 crates, each with a weight from 125 kg up to infinity. Why isn't the maximum weight infinity, or the mass of the Universe, or something of that nature? Nothing in the problem specifies an upper bound.
Mike :-)
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Mike McGarry
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Re: a trailer carries 3,4 and 5 crates on a trip.each crate weig [#permalink] New post 09 Jan 2013, 15:02
chiccufrazer1 wrote:
a trailer
carries 3,4 and 5 crates
on a trip.each crate
weighs no less than
125 kg.what is the
maximum weight of
the crates on a single
trip?

A.1250 B.625 C.600 D.7500 E.375

Posted from my mobile device Image


I believe the question should mention that weight is integer.
Min weight is 125. Let the actual weight be 125 + x
then total weight should be 375 + 3x.
Now Only C, D and E has integer value of x.
Out of the three D has the max value.

So D.
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Re: a trailer carries 3,4 and 5 crates on a trip.each crate weig [#permalink] New post 09 Jan 2013, 22:27
this is an lcm problem @mike...the lowest common multiple of 3 ,4 and 5 crates is 60 crates..therefore we multiply 60 and 125kg to get 7500kg..the statement in the stem question says that each crate weighs no less than 125kg,which means that each crate is greater than 125 kg or equal to it interms of weight.

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Re: a trailer carries 3,4 and 5 crates on a trip.each crate weig [#permalink] New post 10 Jan 2013, 10:10
Expert's post
chiccufrazer1 wrote:
this is an lcm problem @mike...the lowest common multiple of 3 ,4 and 5 crates is 60 crates..therefore we multiply 60 and 125kg to get 7500kg..the statement in the stem question says that each crate weighs no less than 125kg, which means that each crate is greater than 125 kg or equal to it in terms of weight.

Dear chiccufrazer1 -----

The problem begins, "A trailer carries 3, 4 and 5 crates on a trip." First of all, the word "and" seems incorrect here --- Do you mean that a single trailer carries 3 crates, or 4 crates, or 5 crates? Or are you trying to say that the trailer capacity is 3 by 4 by 5 --- say each crate is a cubic meter, and the carriage of the trailer is (3 m) x (4 m) x (5 m) = 60 m^3? If this latter is what you want to communicate, the phrasing in the problem does not say anything like this.

Furthermore, I still contend something is wrong with saying both "Each crate weighs no less than 125 kg" and "What is the maximum weight of the crates on a single trip?" If there are 60 crates, and if each crate weighs 125 kg or more, this means that 60 x 125 = 7,500 kg is the minimum weight of a single trip, NOT the maximum weight. If each crate weighs exactly 125, then 60 crates weigh exactly 7,500, but if each crate weighs, say, 200 kg, then 60 crates would weight 12,000. In general, if the crates weigh more than 125 kg, the trailer will weigh more than 7,500 kg, so 7,500 is a minimum weight, not a maximum weight.

Finally, on the GMAT, numerical answer choices are always written in ascending order. Also, on the GMAT, numbers over 1000 always have commas. It's actually one of the telltale signs of a shoddy GMAT prep source that the numerical answer choices are not in the proper order & format.

If I understand what you are trying to communicate, here is, I believe, the question you were originally trying to pose. I actually chose to make 125 a maximum weight for the crates, not a minimum weight, as this seems more realistic.

A trailer has dimensions of (3 m) x (4 m) x (5 m). The crates are all (1 m)^3 in dimensions, and each one weigh no more than 125 kg. What is the maximum possible weight of the crates when the trailer is full loaded?
(A) 375
(B) 600
(C) 625
(D) 1,250
(E) 7,500


This is now a clear and well-defined question. Is this, in essence, the question you were originally trying to ask?

Mike :-)
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Mike McGarry
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Re: A trailer carries 3, 4 and 5 crates on a trip. Each crate we [#permalink] New post 10 Jan 2013, 11:39
maybe on the word'and' you a are correct..it should have been something like'or'..but 125kg being used as a weight for each crate holds water..as i have already said,the stem statement says that each crate weighs no less than 125kgs..as long as each crate weighs no less than 125 kg then each crate may weigh 125kg or more..you may also want to refer on this question though it has no answers(several cartons of candy are being shipped from a manufacturer to warehouses where they will be prepackaged to sell to stores.the candy in each carton needs to be divided equally among 3,4,5, or 7 stores.what is the least number of pieces of candy that each carton can have?)

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Re: A trailer carries 3, 4 and 5 crates on a trip. Each crate we   [#permalink] 10 Jan 2013, 11:39
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