Search found 48 matches


Manhattan_ Is the postive integer x odd

Is the positive integer x odd?
(1) x = y^2 + 4y +6
(2) x = 9z^2 + 7z - 10

please explain, thank
OA : B
Source: Manhattan challenge problem

by nh8404052006

Sat May 02, 2009 11:37 pm
Forum: Data Sufficiency
Topic: Manhattan_ Is the postive integer x odd
Replies: 1
Views: 973

paint jobs_manhanttam

A paint crew gets a rush order to paint 80 houses in a new development. They paint the first y houses at a rate of x houses per week. Realizing that they'll be late at this rate, they bring in some more painters and paint the rest of the houses at the rate of 1.25x houses per week. The total time it...

by nh8404052006

Sat May 02, 2009 3:04 pm
Forum: Problem Solving
Topic: paint jobs_manhanttam
Replies: 1
Views: 3224

From statement (2) ==>x = &#8211; 1 , but no info abt n ==> insufficient From statement (1) ==> n (x &#8211; 1 ) < 0 . If n = &#8211; 1 and x =2 , n (x &#8211; 1 ) < 0 but when n = 2 and x = 0 , then n (x &#8211; 1 ) < 0 ==> insufficient Both statements together ==>if x = &#8...

by nh8404052006

Sat May 02, 2009 7:26 am
Forum: Problem Solving
Topic: manhattan challenge problem_DS_is n < 1
Replies: 4
Views: 1382

manhattan challenge problem_DS_is n < 1

Is n < 1 ?
(1) nx &#8211; n < 0
(2) x&#8211;1 = &#8211;2

OA: C
Please explain, thank

Source: Manhattan challenge problem

by nh8404052006

Sat May 02, 2009 6:32 am
Forum: Problem Solving
Topic: manhattan challenge problem_DS_is n < 1
Replies: 4
Views: 1382

chicago rainy days

If the probability of rain on any given day in Chicago during the summer is 50%, independent of what happens on any other day, what is the probability of having exactly 3 rainy days from July 4 through July 8, inclusive? Please explain, thank OA : [spoiler]5/16[/spoiler] Source : Manhattan challenge...

by nh8404052006

Sat May 02, 2009 6:04 am
Forum: Problem Solving
Topic: chicago rainy days
Replies: 2
Views: 1490

share 5 donuts--Probability

Larry, Michael, and Doug have five donuts to share. If any one of the men can be given any whole number of donuts from 0 to 5, in how many different ways can the donuts be distributed?

Please explain, thank
OA: 21
Source : Gmat-maths.blocked

by nh8404052006

Sat May 02, 2009 4:08 am
Forum: Problem Solving
Topic: share 5 donuts--Probability
Replies: 8
Views: 2410

My attempt: From question stem: 20 &#8805; 9N + 3 P &#8230;.... (1) From Statement (1) 20 &#8805; 7N + 5 P &#8230;.... (2) From Statement (2) 20 &#8805; 4N + 8 P &#8230;&#8230; (3) (1) + (2) + (3) ==> 60 &#8805; 20N + 16 P &#8230; (4) (4) / 2 ==> 30 &#8805; 10...

by nh8404052006

Fri May 01, 2009 5:56 am
Forum: Data Sufficiency
Topic: notebook and pencil-- inequality
Replies: 16
Views: 4689

notebook and pencil-- inequality

If 20 Swiss Francs is enough to buy 9 notebooks and 3 pencils, is 40 Swiss Francs enough to buy 12 notebooks and 12 pencils? (1) 20 Swiss Francs is enough to buy 7 notebooks and 5 pencils. (2) 20 Swiss Francs is enough to buy 4 notebooks and 8 pencils. OA : B Please explain, thank source: Gmat-maths...

by nh8404052006

Fri May 01, 2009 1:45 am
Forum: Data Sufficiency
Topic: notebook and pencil-- inequality
Replies: 16
Views: 4689

manhattan challenge problem -- terminating zeros

How many terminating zeroes does 200! have?

OA: 49
Please explain, thank

Source: Manhattan challenge problem
http://gmat-maths.blocked/search?u ... results=20

by nh8404052006

Wed Apr 29, 2009 12:04 am
Forum: Problem Solving
Topic: manhattan challenge problem -- terminating zeros
Replies: 3
Views: 2563

Bold face question: delta products _fossil fuel consumption

Delta products, Inc., has recently switched at least partly from older technologies using fossil fuels to new technologies powered by electricity . The question has been raised whether it can be concluded that for a given level of output, Delta&#8217;s operation now causes less fossil fuel to b...

by nh8404052006

Sun Apr 05, 2009 10:58 pm
Forum: Critical Reasoning
Topic: Bold face question: delta products _fossil fuel consumption
Replies: 26
Views: 23965

shuttle and space station

Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity. A: the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fu...

by nh8404052006

Sun Apr 05, 2009 10:14 pm
Forum: Sentence Correction
Topic: shuttle and space station
Replies: 12
Views: 5457

Personally, I will go for D. The reason is that if the number of worker was more or less the same, but the number of hours that a worker work (per day) was reduced by half, then the number of production or the production per worker would be reduced, even with more or less the same number of workers....

by nh8404052006

Fri Mar 20, 2009 5:09 pm
Forum: Critical Reasoning
Topic: GMAT CR Assumption
Replies: 20
Views: 11541

Democrat vs Republic

During Roosevelt&#8217;s years in office Black Americans began voting for Democrats rather than Republicans in national elections, but Black support for Democrats at the state and local levels developed only after when civil rights legislation was supported by Harry Truman. (A) developed only af...

by nh8404052006

Thu Jan 22, 2009 4:45 am
Forum: Sentence Correction
Topic: Democrat vs Republic
Replies: 2
Views: 1724

Town Hall of Amsterdam

By the mid-seventeenth century, Amsterdam had built a new town hall so large that only St. Peter&#8217;s in Rome, the Escorial in Spain, and the Palazza Ducale in Venice could rival it for scale or magnificence. (A) could rival it for (B) were the rivals of it in their (C) were its rival as to (...

by nh8404052006

Mon Jan 19, 2009 8:39 am
Forum: Sentence Correction
Topic: Town Hall of Amsterdam
Replies: 3
Views: 5117

sowell argues

By showing that South Africa does not have a free market and is in fact a kind of collectivist welfare state for Whites only, Sowell argues that American conservatives have no valid ideological grounds to be in sympathy with the Pretoria regime. (A) to be in sympathy with (B) to sympathize with (C) ...

by nh8404052006

Mon Jan 19, 2009 8:18 am
Forum: Sentence Correction
Topic: sowell argues
Replies: 4
Views: 1655