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Submitted 2009-05-13 03:54:37

GRE #11

Questions 1-5

Six arms negotiators—M, O, P, R, S, and T—are to
be seated at a round table to discuss disarmament. There
are exactly six chairs around the table. Each negotiator
sits facing the center of the table and is directly opposite
a negotiator across the table. The seating arrangement is
subject to the following restrictions:
T cannot sit next to P.
S cannot sit next to M.
R must sit next to M.

1. If R sits next to S on S’s right side, who must sit
next to R on R’s right side?
(A) M (B) O (C) P (D) S (E) T

2. Which of the following is an acceptable sequence of
negotiators around the table?
(A) M, S, R, T, P, O
(B) M, S, T, P, R, O
(C) T, O, P, S, M, R
(D) T, R, M, P, S, O
(E) T, S, R, M, O, P

3. If M sits next to P, which of the following is a
complete and accurate list of those who can sit next
to P on P’s other side?
(A) O (B) O, S (C) O, S, R
(D) R, S, T (E) O, R, S, T

4. If T sits next to M and S sits next to R, which of
the other negotiators must sit next to S?
(A) M (B) O (C) P (D) R (E) T

5. If T sits directly across the table from O, who must
sit on either side of P?
(A) M and O (B) M and S
(C) O and R (D) O and S
(E) R and T

6. Contrary to the assumption that modern tech-
nology allows us to improve on nature, it is clear
that any major technologically induced changes in
a natural system are likely to be detrimental to that
system. If you were to open the back of your watch,
close your eyes, and poke a pencil into the exposed
works, the almost certain result would be damage
to the watch. Living organisms too, when subjected
to technological alteration, will almost certainly be
damaged rather than improved.

The argument above is developed by
(A) citing a consensus of opinion about technology
among formed observers
(B) projecting the effects of change in a natural
system from observation of a representative
case
(C) drawing an analogy between a natural system
and a mechanical device
(D) analyzing a natural system in terms of its
constituent parts
(D) examining the results of technological innova-
tions of the past

7. The plant called the scarlet gilia can have either red
or white flowers. It had long been thought that
hummingbirds, which forage by day, pollinate its
red flowers and that hawkmoths, which forage at
night, pollinate its white flowers. To try to show
that this pattern of pollination by colors exists, sci-
entists recently covered some scarlet gilia flowers
only at night and others only by day: plants with
red flowers covered at night became pollinated;
plants with white flowers covered by day became
pollinated.

Which of the following, if true, would be addi-
tional evidence to suggest that hummingbirds are
attracted to the red flowers and hwkmoths to the
white flowers of the scarlet gilia?
(A) Uncovered scarlet gilia flowers, whether red or
white, became pollinated at approximately
equal rates.
(B) Some red flowers of the scarlet gilia that
remained uncovered at all times never
became pollinated.
(C).White flowers of the scarlet gilia that were cov-
ered at night became pollinated with greater
frequency than white flowers of the scarlet
gilia that were left uncovered.
(D) Scarlet gilia plants with red flowers covered by
day and scarlet gilia plants with white
flowers covered at night remained unpollinated.
(E) In late August, when most of the humming-
birds had migrated but hawkmoths were still
plentiful, red scarlet gilia plants produced
fruit more frequently than they had earlier in
the season.

8. The chief executive officer of one of the country’s
most successful steel manufacturing firms is amused
at the publicity her management practices have
attracted. She thinks managers get too much of the
credit for upswings in their businesses. “A fickle
public assumes too easily that managers are brilliant
when demand is strong and idiotic when it is weak,”
she asserts.

It can be inferred from the statement made by the
chief executive officer that she believes which of the
following?
(A) A successful manager should attempt to control
public opinion.
(B) There are no managers who can justifiably be
said to be brilliant.
(C) Her own management practices are likely to be
of little value to other businesses.
(D) The role of managers becomes less important
during economic downturns than it is in rela-
tively prosperous times.
(E) The level of demand for the products of manu-
facturing firms cannot be completely con-
trolled by the managers of the firms.

Questions 9-13

Exactly six detectives—S, T, U, X, Y, and Z—take
turns watching a suspect. To minimize the chance that
the suspect will observe them or will escape their surveil-
lance, the detectives will operate according to the follow-
ing conditions:
There must be exactly two detectives watching the
suspect at all times.
Whenever the suspect travels by car, either U or X
must be one of the two detectives watching, but
U and X cannot take a turn together.
Whenever the suspect travels by train, either T or Z
must be one of the two detectives watching, but
T and Z cannot take a turn together.
If Z is one of the detectives watching the suspect,
S must be the other detective watching the sus-
pect.
S and X cannot take a turn together watching the
suspect.

9. If the suspect is traveling by car, which of the
following is a pair of detectives who could be
watching?
(A) S and T (B) S and X (C) T and Y
(D) U and X (E) U and Y

10. If the suspect travels by train and T is not one of
the detectives watching, the pair watching must be
(A) S and Y (B) S and Z (C) U and Z
(D) X and Y (E) X and Z

11. If Y is one of the detectives watching the suspect,
which of the following CANNOT be the other
detective watching the suspect?
(A) S (B) T (C) U (D) X (E) Z

12. If the suspect travels by car and S is one of the
detective watching, the other detective watching
the suspect must be
(A) T (B) U (C) X (D) Y (E) Z

13. If a pair of detectives was watching while the sus-
pect traveled by car, and the same pair of detectives
continued watching after the suspect began to
travel by train, one member of that pair of detec-
tives must have been
(A) T (B) U (C) X (D) Y (E) Z

Question 14-16

A hospital administrator is assigning five patients—N,
P, T, V, and X—to three rooms. Each room has two
single beds for patients. The assignment is subject to the
following restrictions:
Patients sharing a room must be of the same sex.
A patient with disease G cannot share a room
with a patient who has an infection.
Patients V and X have disease G and no
infection.
Patient N has an infection.
Patients P and T each have a broken leg and no
other illness or disability.
Patients N, T, and X are male, and patients P
and V are female.

14. If N shares a room with T, which of the following
is true?
(A) None of the patients shares a room with any
patient with disease G.
(B) None of the patients shares a room with X.
(C) None of the patients shares a room with any
patient with a broken leg.
(D) A patient with a broken leg shares a room
with X.
(F) A patient with disease G shares a room
with X.

15. If a sixty patient is assigned to the remaining bed, it
must be true that the sixth patient
(A) is male
(B) is female or, if male, does not have an infection
(C) has a broken leg
(D) does not have an infection
(E) has disease G

16. If Z, a male patient with disease G and no infec-
tion, is a newly admitted sixth patient who is also to
be assigned to one of the three rooms, Z must
share a room with
(A) N (B) P (C) T (D) V (E) X

Questions 17-22

During its manufacture any widget enters an assembly
line having exactly seven consecutively numbered
work stations (1 through 7). Each station is operated
by either one human worker or by one robot.
Exactly three of the operators—K, L, and M—are
human workers. Exactly two of the operators—R-1
and R-2—are robots, and each of the robots oper-
ates exactly two consecutively numbered stations.
An entering widget arrives first at station 1 and is subse-
quently moved through stations 2, 3, 4, 5, 6, and 7,
in that order. However, if at any station a flaw is
detected in a widget, that widget is removed from
the assembly line at the station where the flaw is
detected. A flaw in a widget can occur anywhere on
the assembly line, and a flaw can be detected at any
station operated by a human worker, with the
exception that flaws in widgets cannot be detected at
station 1. A widget enters an assembly line on one
occasion only.
Although only human operators can detect flaws in
widgets, they do not necessarily detect every flaw.

17. Which of the following is a possible set of assign-
ments of operators to stations?
Station Number
1 2 3 4 5 6 7
(A) R-2 R-2 L K M R-1 R-1
(B) R-1 R-2 M R-1 R-2 K L
(C) M R-1 R-1 K R-2 L R-2
(D) L M R-2 R-1 R-2 R-1 K
(E) K L R-1 R-1 R-2 M L

18. If K is assigned to station 7 and L is assigned to
station 4, which of the following must be true?
(A) K but not L could detect a flaw in a widget on
the assembly line.
(B) M is assigned to either station 1 or 3.
(C) R-1 is assigned to either station 3 or 5.
(D) R-2 is assigned to stations 5 and 6.
(F) A flaw in a widget that is created at station 3
could be detected at station 6.

19. If R-2 causes a flaw in a widget at station 4, and
the flaw is detected and the flawed widget is
removed from the assembly line at station 6,
L could operate any one of the following stations
EXCEPT
(A) 1 (B) 2 (C) 3 (D) 5 (E) 7

20. If M operates station 6, which of the following
must be true?
(A) K operates either station 1 or 7.
(B) L operates either station 3 or 5.
(C) Either K or L operates an even-numbered
station.
(E) K and L operate stations that are immediately
adjacent to each other.
(E) L operates an odd-numbered station.

21. If R-1 operates station 3 and K is the only opera-
tor on the assembly line who is in a position to
detect flaws in widgets that are created by R-1,
which of the following must be true?
(A) K operates station 4.
(B) K operates station 5.
(C) L operates station 1.
(D) R-1 operates station 4.
(E) R-2 operates station 5.

22. Under an additional rule stipulating that R-1 must
operate station 3 or 4 but cannot operate both, and
that R-2 must operate station 5 or 6 but cannot
operate both, any of the following would be possi-
ble robot assignments EXCEPT:
(A) R-1 is assigned to station 2, and R-2 is
assigned to station 4.
(B) R-1 is assigned to station 3, and R-2 is
assigned to station 5.
(C) R-1 is assigned to station 3, and R-2 is
assigned to station 6.
(D) R-1 is assigned to station 4, and R-2 is
assigned to station 5.
(E) R-1 is assigned to station 5, and R-2 is
assigned to station 6.

23. To many environmentalists, the extinction of
plants—accompanied by the increasing genetic uni-
formity of species of food crops— is the single most
serious environmental problem. Something must be
done to prevent the loss of wild food plants or no-
longer- cultivated food plants. Otherwise, the lack
of genetic diversity could allow a significant portion
of a major crop to be destroyed overnight. In 1970,
for example, southern leaf blight destroyed approx-
imately 20 percent of the United States corn crop,
leaving very few varieties of corn unaffected in the
areas over which the disease had spread.

Which of the following can be inferred from the
passage above?
(A) Susceptibility to certain plant diseases is geneti-
cally determined.
(B) Eighty percent of the corn grown in the United
States is resistant to southern leaf blight.
(C) The extinction of wild food plants can in
almost every case be traced to destructive
plant diseases.
(D) Plant breeders focus on developing plants that
are resistant to plant disease.
(E) Corn is the only food crop threatened by
southern leaf blight.

24. Many pregnant women suffer from vitamin defi-
ciency, but this is frequently not due to vitamin defi-
ciency in their diets; most often it is because they
have higher requirements for vitamins than do the
rest of the population.

The best criticism of the reasoning in the statement
above is that it
(A) fails to specify the percentage of pregnant
women who suffer from vitamin deficiency
(B) gives insufficient information about why preg-
nant women have higher vitamin require-
ments than do other groups
(C) fails to employ the same reference group for
both uses of the term “vitamin deficiency”
(D) provides insufficient information about the inci-
dence of vitamin deficiency in other groups
with high vitamin requirements
(E) uses “higher requirements” in an ambiguous
manner

25. Whenever the sun is shining and the windchill factor
is below zero, Susan wears her parka. Whenever it is
raining and the windchill factor is above zero, Susan
wears her raincoat. Sometimes it rains when the sun
is shining.

If the above statements are true, which of the fol-
lowing must also be true?
(A) If it is not raining and Susan is wearing her
parka, the sun is shining.
(B) If the windchill factor is below zero and Susan
is not wearing her parka, the sun is not
shining.
(C) If the windchill factor is below zero and it is not
raining, Susan is wearing her parka.
(D) If the windchill factor is below zero and it is
raining, Susan is wearing her raincoat.
(E) If it rains while the sun is shining and the wind-
chill factor is zero, Susan wears her parka.

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Question Popularity: Submitted 2009-05-13 03:54:37

Question Popularity:
Submitted 2009-05-13 03:54:37