Сообщений в теме: 954

[Kasatka]

DS1 - each of the offices in a building has an area of 200, 300 and 350 sq.feet. How many offices there are on the 1st floor?
1) total area of the first floor is 9500 sq.feet
2) ten of the offices on the 1st floor have area of 350 sq.feet each

ответ E

1) 9500 можно по разному разбить:
(350*10)+(300*10)+(200*15)
(350*10)+(300*20)
2) NS

Вместе условия тоже not suff.

[Kasatka]

Most teen-agers who work for pay hold jobs that require few skills, little responsibility, and also no hope for career advancement.
(A) little responsibility, and also
(B) little responsibility, and with
(С) little responsibility, and offer
(D) carry little responsibility, and
(E) carry little responsibility, and offer

[Kasatka]

DS2 - космос какойто:

q q q q
q r s t
q u v w
q x y z

In the table above, is z=20q?
1) q=3
2) each value in table except for q is equal to sum of the values above and sum of the values to the left of it

B

[Kasatka]

PS - a certain meter records values between 0 and 10 volts, inclusive. If average value of 3 recordings was 8 volts, what was the smallest possible recording, in volts?
A) 2
B) 3
C) 4
D) 5
E) 6

Snare, решение

(10+10+X)/3=8

[Snare]

Kasatka molodec. Сейчас на трезвую голову мне все это уже очевидно, кроме того космического судоку. Объяснишь?

[crosswall]

RC by Snare:
16B 17C 18D 19C 20B 21B 22B(or A?) 23E
SC - C

Correct (22 - В)

[Snare]

RC by Snare:
16B 17C 18D 19C 20B 21B 22B(or A?) 23E
SC - C

Correct (22 - В)

спасибо crosswall. однако, положа руку на сердце, на каждый вопрос ушло поболее 2х минут

[crosswall]

q q q q
q r s t
q u v w
q x y z
In the table above, is z=20q?
1) q=3 - unsuf

2) each value in table except for q is equal to sum of the values above and sum of the values to the left of it
Если считать согласно условию, то u=2q (q сверху и q слева). Тогда s=q+r+q=4q и т.д. можно дойти и до z. При этом нам все равно чему z равно. Главное, что можем в принципе найти z и потом дать ответ равно z 20q или нет. Мне кажется, что Kasatka именно это и имела ввиду.

Сообщение отредактировал crosswall: 21.01.2009, 13:37:59

[Snare]

q q q q
q r s t
q u v w
q x y z
In the table above, is z=20q?
1) q=3 - unsuf

2) each value in table except for q is equal to sum of the values above and sum of the values to the left of it
Если считать согласно условию, то u=2q (q сверху и q слева). Тогда s=q+r+q=4q и т.д. можно дойти и до z. При этом нам все равно чему z равно. Главное, что можем в принципе найти z и потом дать ответ равно z 20q или нет. Мне кажется, что Kasatka именно это и имела ввиду.

упссс, сорри , я оказывается неточно второе условие понял и переписал: each value in table except for q is equal to sum of the value immediately above aтв the value immediately to its left on the tableэто меняет смысл, все стало проще

Сообщение отредактировал Snare: 21.01.2009, 13:43:47

[Kasatka]

..
each value in table except for q is equal to sum of the values above and sum of the values to the left of it
...
each value in table except for q is equal to sum of the value immediately above aтв the value immediately to its left on the table

если честно я тоже сперва не поняла, нужно все значения сверху и слева суммировать или только те которые над ним и слева от него, но в принципе это не имеет значения и так и эдак мы сможем ответить на вопрос.

Сообщение отредактировал Kasatka: 21.01.2009, 13:49:02

[crosswall]

SCs B, E

explain pls

[Kasatka]

Most teen-agers who work for pay hold jobs that require few skills, little responsibility, and also no hope for career advancement.
(A) little responsibility, and also
(B) little responsibility, and with
(С) little responsibility, and offer
(D) carry little responsibility, and
(E) carry little responsibility, and offer

who work for pay hold jobs that require few skills - это что-то вроде определяющего выражения

Нужно Most teenagers ... verb, т.е. 1,2,3 варианты отпадают, ну и тут 2 verb-a carry & offer.

Сообщение отредактировал Kasatka: 21.01.2009, 14:05:28

[crosswall]

Kasatka, а как с шинами?

[Kasatka]

Car owners who inflate their tires properly can substantially boost their vehicles' fuel efficiency, since the increase in car-road friction can waste up to five percent of car fuel by underinflation.

(A) Car owners who inflate their tires properly can substantially boost their vehicles' fuel efficiency, since the increase in car-road friction can waste up to five percent of car fuel by underinflation.
(B) Because the underinflation of tires can waste up to five percent of a car's fuel by increasing car-road friction, car owners can substantially boost their vehicles' fuel efficiency by properly inflating the tires.
(С) Their vehicles' fuel efficiency is substantially boosted by car owners through the proper inflation of tires that, when underinflated, can waste up to five percent of car fuel by an increase in car-road friction.
(D) The proper inflation of tires by car owners, due to the fact that underinflation can waste up to five percent of a car's fuel by the increase of car-road friction, can substantially boost their fuel efficiency.
(E) Because up to five percent of a car's fuel are wasted through the increases in car-road friction when the tires are underinflated, car owners properly inflating tires can substantially boost their fuel efficiency.

C) начало предложения уже неверно Their - чей
D) The proper inflation of tires by car owners... can substantially boost their fuel efficiency. (чей efficiency-шин или владельцев?)
E) опять же для меня непонятно чей efficiency-шин или владельцев?

Колеблюсь между A & B, но в A меня смущает owners...their tires и by underinflation.
Вариант В мне не очень нравится - слишком длинное, слишком много выражений, но в сравнении с другими более-менее подходящий, на мой взгляд.

[Snare]

в варианте А не хватает свзяки caused перед by underinflation. вариант В рулит
а про тинейджеров - там вроде как Параллел Стракча глагол-существительное должен соблюдаться

Сообщение отредактировал Snare: 21.01.2009, 15:57:04

[crosswall]

6. A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead. If the necklace design begins with a red bead and ends with a white bead, then N could equal
(A) 16
(B) 32
(с) 41
(D) 54
(E) 68

7. If x=(0.08)^2, y=1/(0.08)^2, and z=(1-0.08)^2 - 1,
which of the following is true?
(A) x=y=z
(B) y<z<x
(С) z<x<y
(D) y<x and x=z.
(E) x<y and x=z.

15. Working alone, printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 12, 15, and 18 hours, respectively. What is the ratio of the time it takes printer X to do the job, working alone at its rate, to the time it takes printers Y and Z to do the job, working together at their individual rates?
(A) 4/11
(B) 1/2
(С) 15/22
(D) 22/15
(E) 11/4

Сообщение отредактировал crosswall: 21.01.2009, 16:05:01

[crosswall]

(B) Because the underinflation of tires can waste up to five percent of a car's fuel by increasing car-road friction, car owners can substantially boost their vehicles' fuel efficiency by properly inflating the tires. - correct

Опять RC
It was once assumed that all living things could be
divided into two fundamental and exhaustive categories.
Multicellular plants and animals, as well as many unicellu-
lar organisms, are eukaryotic—their large, complex cells
(5) have a well-formed nucleus and many organelles. On the
other hand, the true bacteria are prokaryotic cells, which
are simple and lack a nucleus. The distinction between
eukaryotes and bacteria, initially defined in terms of
subcellular structures visible with a microscope, was ulti-
(10) mately carried to the molecular level. Here prokaryotic
and eukaryotic cells have many features in common. For
instance, they translate genetic information into proteins
according to the same type of genetic coding. But even
where the molecular processes are the same, the details in
(15) the two forms are different and characteristic of the respect-
tive forms. For example, the amino acid sequences of vari-
ous enzymes tend to be typically prokaryotic or eukaryotic.
The differences between the groups and the similarities
within each group made it seem certain to most biologists
(20) that the tree of life had only two stems. Moreover, argu-
ments pointing out the extent of both structural and func-
tional differences between eukaryotes and true bacteria
convinced many biologists that the precursors of the
eukaryotes must have diverged from the common ancestor
(25) before the bacteria arose.
Although much of this picture has been sustained by
more recent research, it seems fundamentally wrong in one
respect. Among the bacteria, there are arganisms that are
significantly different both form the cells of eukaryotes and
(30) from the true bacteria, and it now appears that there are
three stems in the tree of life. New techniques for deter-
mining the molecular sequence of the RNA of organisms
have produced evolutionary information about the degree to
which organisms are related, the time since they diverged
(35) from a common ancestor, and the reconstruction of ances-
tral versions of genes. These techniques have strongly
suggested that altough the true bacteria indeed from a
large coherent group, certain other bacteria, the archaebac-
teria, which are also prokaryotes and which resemble true
(40) bacteria, represent a distinct evolutionary branch that far
antedates the common ancestor of all true bacteria.


9. The passage is primarily concerned with
(A) detailing the evidence that has led most biologists to replace the trichotomous picture of living organisms with a dichotomous one
(B) outlining the factors that have contributed to the current hypothesis concerning the number of basic categories of living organisms
(С) evaluating experiments that have resulted in proof that the prokaryotes are more ancient than had been expected
(D) summarizing the differences in structure and function found among true bacteria, archaebacteria, and eukaryotes
(E) formulating a hypothesis about the mechanisms of evolution that resulted in the ancestors of the prokaryotes

10. According to the passage, investigations of eukaryotic and prokaryotic cells at the molecular level supported the conclusion that
(A) most eukaryotic organisms are unicellular
(B) complex cells have well-formed nuclei
(С) prokaryotes and eukaryotes form two fundamental categories
(D) subcellular structures are visible with a microscope
(E) prokaryotic and eukaryotic cells have similar enzymes

11. According to the passage, which of the following statements about the two-category hypothesis is likely to be true?
(A) It is promising because it explains the presence of true bacteria-like organisms such as organelles in eukaryotic cells.
(B) It is promising because it explains why eukaryotic cells, unlike prokaryotic cells, tend to form multicellular organisms.
(С) It is flawed because it fails to account for the great variety among eukaryotic organisms.
(D) It is flawed because it fails to account for the similarity between prokaryotes and eukaryotes.
(E) It is flawed because it fails to recognize an important distinction among prokaryotes.

12. It can be inferred from the passage that which of the following have recently been compared in order to clarify the fundamental classifications of living things?
(A) The genetic coding in true bacteria and that in other prokaryotes
(B) The organelle structures of archaebacteria, true bacteria, and eukaryotes
(С) The cellular structures of multicellular organisms and unicellular organisms
(D) The molecular sequences in eukaryotic RNA, true bacterial RNA, and archaebacterial RNA
(E) The amino acid sequences in enzymes of various eukaryotic species and those of enzymes in archaebacterial species

13. If the “new techniques” mentioned in line 31 were applied in studies of biological classifications other than bacteria, which of the following is most likely?
(A) Some of those classifications will have to be reevaluated.
(B) Many species of bacteria will be reclassified.
(С) It will be determined that there are four main categories of living thinks rather than three.
(D) It will be found that true bacteria are much older than eukaryotes.
(E) It will be found that there is a common ancestor of the eukaryotes, archaebacteria, and true bacteria.

14. According to the passage, researchers working under the two-category hypothesis were correct in thinking that
(A) prokaryotes form a coherent group
(B) the common ancestor of all living things had complex properties
(С) eukaryotes are fundamentally different from true bacteria
(D) true bacteria are just as complex as eukaryotes
(E) ancestral versions of eukaryotic genes functioned differently from their modern counterparts

15. All of the following statements are supported by the passage EXCEPT:
(A) True bacteria form a distinct evolutionary group.
(B) Archaebacteria are prokaryotes that resemble true bacteria.
(С) True bacteria and eukaryotes employ similar types of genetic coding.
(D) True bacteria and eukaryotes are distinguishable at the subcellular level.
(E) Amino acid sequences of enzymes are uniform for eukaryotic and prokaryotic organisms.

16. The author’s attitude toward the view that living things are divided into three categories is best described as one of
(A) tentative acceptance
(B) mild skepticism
(С) limited denial
(D) studious criticism
(E) wholehearted endorsement

[Snare]

6. A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead. If the necklace design begins with a red bead and ends with a white bead, then N could equal
(A) 16
(B) 32
© 41
(D) 54
(E) 68

ответ Е. задача на признак делимости (5х + 3) на варианты ответа. вот эту вроде за две минуты успел решить

[crosswall]

в варианте А не хватает свзяки caused перед by underinflation. вариант В рулит
а про тинейджеров - там вроде как Параллел Стракча глагол-существительное должен соблюдаться

well done, Snare & Kasatka
let's go ahead...

[Snare]

7. If x=(0.08)^2, y=1/(0.08)^2, and z=(1-0.08)^2 - 1,
which of the following is true?
(A) x=y=z
(B) y<z<x
© z<x<y
(D) y<x and x=z.
(E) x<y and x=z.

ответ С. эту тоже за пару минут успел.. все, gimme optional break!