Critical Reasoning

I would go with C

IMO E and definitely a tricky one to mentally visualize w/o writing it down on paper.

Given:
T > M;
Majority S > M;

Implied:
some/minority S <= M (T > M >= some/minority S);

Therefore:
Answer is E, T > some/minority S

Definitely E.

We know:

tulips > maples
some sycamores > maples
maples > some sycamores
all maples > dogwoods

so we know

tulips / [some] sycamores > maples > dogwoods / [some] sycamores

Important: We have no info on the relation of tulips to sycamores or dogwoods to sycamores.

A) Some dogwoods are as old as the youngest tulip trees.

This is impossible. If all tulips are older than maples and all dogwoods are younger than maples, no dogwoods could be as old as tulip trees. Eliminate.

B) Some dogwoods are as old as the youngest sycamores.

This is possible but we are looking for a must be true. The oldest dogwood could be 1 year old and the youngest sycamore 6 years old, and we could still fulfill the terms of the question. Eliminate.

C) Some sycamores are not as old as the oldest dogwoods.

Again, this is possible, but it doesn't need to be true to fulfill the terms of the problem. Eliminate.

D) Some tulip trees are not as old as the oldest sycamore.

Once again, this is possible. Some tulip trees could be younger than the oldest sycamore, we have no info as to the relation between tulips and sycamores. But it is equally possible that all tulip trees are older than the oldest sycamore. Eliminate.

E) Some sycamores are not as old as the youngest tulip trees.

This is the only one that must be true. Since the youngest tulip trees are still older than maple trees, and there are some sycamores that are younger than maple trees, this condition must be true according to the passage.

ranell wrote:A, C and D are out of scope.
So we remain between B and E.

B states that if the sole pollinator of plants is in no danger, the plant species are unlikely to become extinct... In this case it is very extreme to as that they are unlikely because other factors, apart from pollination, can affect the extinction of the plant

E states that the total destruction of some plant species could cause some bee species to become extinct. This is the right answer as in the argument some pollinating species can feed only from a sole class of plants. Thus the extinction of such plants will probably cause the extinction of pollinating species

E is right answer

i think i got it now. thanks for pointing it out..

myohmy wrote:Definitely E.

We know:

tulips > maples
some sycamores > maples
maples > some sycamores
all maples > dogwoods

so we know

tulips / [some] sycamores > maples > dogwoods / [some] sycamores

Important: We have no info on the relation of tulips to sycamores or dogwoods to sycamores.

A) Some dogwoods are as old as the youngest tulip trees.

This is impossible. If all tulips are older than maples and all dogwoods are younger than maples, no dogwoods could be as old as tulip trees. Eliminate.

B) Some dogwoods are as old as the youngest sycamores.

This is possible but we are looking for a must be true. The oldest dogwood could be 1 year old and the youngest sycamore 6 years old, and we could still fulfill the terms of the question. Eliminate.

C) Some sycamores are not as old as the oldest dogwoods.

Again, this is possible, but it doesn't need to be true to fulfill the terms of the problem. Eliminate.

D) Some tulip trees are not as old as the oldest sycamore.

Once again, this is possible. Some tulip trees could be younger than the oldest sycamore, we have no info as to the relation between tulips and sycamores. But it is equally possible that all tulip trees are older than the oldest sycamore. Eliminate.

E) Some sycamores are not as old as the youngest tulip trees.

This is the only one that must be true. Since the youngest tulip trees are still older than maple trees, and there are some sycamores that are younger than maple trees, this condition must be true according to the passage.

Perfect explanation. OA is E

You are so good with the Verbal. By the way, congrats for the HBS 2+2 interview invite. I got ding.
Can you pm me your e-mail id. I would like to take some tips from you regarding the Verbal part.

Thanks

Next Question :

IMO A

IMO A

A

yes should be A

If there is some other debt more important than debt on hand.. then she will pay it first because mayor repays her debt asap..

IMO - Answer is definitely A.
E comes close as it says - the only way Lee could be adequately rewarded is by the position. the argument doesnot talk about adequately rewarding though.

OA is A

Here comes the next one.

gmat740 wrote:OA is A

Here comes the next one.

Its A.

If the recycled plastic is made from lowest commercial grade plastic, it will be of such lower quality that it won't have any use.

A, the rest are out of scope

OA is definitely A

Next one is as follows :

A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.
B. The shade of color of some plants tends to change appreciably over the course of their growing season.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.