serGINho

5048 Is nonnegative integer x odd? (1) x! = |x - 1|! (2) x! = (x + 1)!

5287 A room of height 10 feet and equal length and width has a cylindrical pillar exactly in the center, what is the volume of the room excluding the space occupied by the pillar? (1) The farthest horizontal distance from any point in the room to the pillar is 10 feet. (2) The area occupied by the base of the pillar is 4π feet. (A) Statement (1) ALONE is sufficient, but statement (2) is not sufficient. (B) Statement (2) ALONE is sufficient, but statement (1) is not sufficient. © BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. (D) EACH statement ALONE is sufficient. (E) Statements (1) and (2) TOGETHER are NOT sufficient.

6299 If xy = 3, what is the value of xy(x + y) ? (1) x – y = 2 (2) x2 + y2 = 10 (A) Statement (1) ALONE is sufficient, but statement (2) is not sufficient. (B) Statement (2) ALONE is sufficient, but statement (1) is not sufficient. © BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. (D) EACH statement ALONE is sufficient. (E) Statements (1) and (2) TOGETHER are NOT sufficient.

6303 If r and s are nonzero integers, is an integer ? (1) s – 4 = (r + 2)(r – 2) (2) r2 – s2 = -12 (A) Statement (1) ALONE is sufficient, but statement (2) is not sufficient. (B) Statement (2) ALONE is sufficient, but statement (1) is not sufficient. © BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. (D) EACH statement ALONE is sufficient. (E) Statements (1) and (2) TOGETHER are NOT sufficient.

the oa is C

unfortunately the explanation is not mine :) the question is from the MGMAT CAT (range of difficulty 700-800)

2562 Is x a multiple of 9? (1) x = (b!)©, where b and c are distinct integers greater than 2. (2) x is a multiple of integer c and c

one more vote for A first of all because if you do not mention that 20 % of passengers wear seatbelts - it means that there could be another reasson for them to survive.

sounds - not a very good reason in gmat

hey guys, looks correct, I like it much - these are very nice reasons :) but we need something more specific to eliminate D. here is the official explanation "Demand for scientific research" implies that the research is in demand, when in fact it is the platinum. "Demand in scientific research" would be better.

the oa is A here is the explanation why C is wrong © The choice moves the phrase "located farther from the center" to a new position, which alters the meaning of the sentence. The original meaning states that the winds are located farther from the center of the storm. This sentence states that the zone is located farther from the winds, which is nonsensical.

the point is not only in parallelism

In comparison with tropical cyclone systems, subtropical cyclone systems have a relatively broad zone of maximum winds located farther from the center, and typically have a less symmetric wind field. with tropical cyclone systems, subtropical cyclone systems have a relatively broad zone of maximum winds located farther from the center, and typically have with tropical cyclone systems, subtropical cyclone systems have a relatively broad zone of maximum winds located farther from the center, and typically has with tropical cyclone systems, subtropical cyclone systems have a relatively broad zone located farther from the center of maximum winds, and typically have to tropical cyclone systems, subtropical cyclone systems have a relatively broad zone of maximum winds located farther from the center, and typically have to tropical cyclone systems, subtropical cyclone systems have a relatively broad zone of maximum winds located farther from the center, and typically has

Because of less availability and greater demand for scientific research, platinum remains consistently expensive, like gold. Because of less availability and greater demand for scientific research, platinum remains consistently expensive, like gold. Because of less availability and increased demand for scientific research, platinum remains consistently expensive, like that of gold. Because of decreased availability and increased demand in scientific research, platinum remains expensive, like gold. Because of decreased availability and increased demand for scientific research, platinum remains expensive, like gold. Because of decreased availability and greater demand in scientific research, platinum remains at a consistently high price, like that of gold.

Compare C to D. C moves "prominently" to another location in the sentence, which changes the meaning of that phrase. D uses the correct past perfect tense and simple past tenses for the verbs and places the adjective "prominent" in the correct location to modify journalists. Eliminate C. Compare D to E. E eliminates the relative pronoun "who," which results in a modifier that is unclear. Eliminate E.

Since the verb in the underlined portion is incorrect as written eliminate A and any choice that commits the same error. This eliminates A and B.

yes it does

25 What is the value of positive integer b? (1) There are exactly 3 positive integer multiples of b which are less than 10. (2) There are exactly 3 positive integer multiples of b which are greater than 2 but less than 10. (A) Statement (1) ALONE is sufficient, but statement (2) is not sufficient. (B) Statement (2) ALONE is sufficient, but statement (1) is not sufficient. © BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. (D) EACH statement ALONE is sufficient. (E) Statements (1) and (2) TOGETHER are NOT sufficient.

the oa doen`t agree with A :)

but we compare action silver values in most markets of the world rose with what? with thoose?

hey EF! don`t forget about us :)

future refers to difficulty. where do you see the redundancy?

hi EF! could you please provide an explanation for choosing D but not E

8230 Trace Elements was a weekly news serial with a decidedly political slant until ownership was transferred in 1965 to a larger magazine publisher owned by C. H. McFadden, who decided to expand the scope of the magazine and hired several prominent journalists away from competing news publications to help with the task. (A) who decided to expand the scope of the magazine and hired several prominent journalists away from (B) who, when he decided to expand the scope of the magazine, prominently hired several journalists away from © who, deciding to expand the scope of the magazine, had prominently hired several journalists (D) who had decided to expand the scope of the magazine and hired several prominent journalists from (E) deciding to expand the scope of the magazine and hired several prominent journalists away from

8228 From the evolution of various types of animals and plants have come a profound amount of biological diversity that are continuously changing and effecting the environment and the biological landscape. (A) types of animals and plants have come a profound amount of biological diversity that are continuously changing and effecting (B) types of animals and plants have come a profound amount of biological diversity that is continuously changing and affecting © animals and plants has come a profound amount of biological diversity that is continuously changing and affecting (D) animals and plants has come a profound amount of biological diversity, continuously changing and effecting (E) animals and plants has come a profound amount of biological diversity that continuously change and affect