Search found 32 matches


GMATprep problems, please explain!

For which of the following functions is f(a+b) = f(a) + f(b) for all positive numbers a and b? a. f(x) = x^2 b. f(x) = x +1 c. f(x) = square root of x d. f(x) = 2/x e. f(x) = -3x A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors: blue, green, yellow, or pink. The ...

by Veronica

Mon Oct 11, 2010 11:57 pm
Forum: Problem Solving
Topic: GMATprep problems, please explain!
Replies: 2
Views: 1282

Probability and decimal

Each of the 25 balls in a certain box is either read, blue, or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the probability that the ball selected will either be white or have an even number painted on it? 1. Probability that the ba...

by Veronica

Mon Oct 11, 2010 11:48 pm
Forum: Data Sufficiency
Topic: Probability and decimal
Replies: 3
Views: 2465

How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3? a.15, b.16, c.17, d.18, e.19 For this problem, I chose B, is it correct? If a and b are positive integers such that a-b and a/b are both even integers, which of the following must be an odd integer? a.a/2, b.b/2, c....

by Veronica

Tue Sep 28, 2010 8:55 pm
Forum: Problem Solving
Topic: Integer
Replies: 8
Views: 1724

How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3? a.15, b.16, c.17, d.18, e.19 For this problem, I chose B, is it correct? If a and b are positive integers such that a-b and a/b are both even integers, which of the following must be an odd integer? a.a/2, b.b/2, c....

by Veronica

Tue Sep 28, 2010 8:46 pm
Forum: Problem Solving
Topic: Integer
Replies: 8
Views: 1724

Please explain, thanks!

Escalating worldwide demand for corn has led to a sharp increase in the market price of corn, and corn prices are likely to remain high. Corn is extensive used as feed for livestock, and because profit margins are tight in the livestock business, many farmers are expected to leave the business. With...

by Veronica

Tue Sep 28, 2010 5:14 am
Forum: Critical Reasoning
Topic: Please explain, thanks!
Replies: 2
Views: 1429

Probability, ratio, motion

6 cards numbered from 1 to 6 are placed in an empty bowl. First one card is drawn and then put back into the bowl; then a second card is drawn. If the cards are drawn at random and if the sum of the numbers on the cards is 8, what is the probability that one of the two cards drawn is numbered 5? a.1...

by Veronica

Tue Sep 28, 2010 4:34 am
Forum: Problem Solving
Topic: Probability, ratio, motion
Replies: 6
Views: 3020

Integer

How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3? a.15, b.16, c.17, d.18, e.19 For this problem, I chose B, is it correct? If a and b are positive integers such that a-b and a/b are both even integers, which of the following must be an odd integer? a.a/2, b.b/2, c.(...

by Veronica

Tue Sep 28, 2010 4:12 am
Forum: Problem Solving
Topic: Integer
Replies: 8
Views: 1724

Integer

If k, m and t are positive integers and k/6 + m/4 = t/12, do t and 12 have a common factor greater than 1?
1. k is a multiple of 3
2. m is a multiple of 3

Please explain this question for me, thank u!

by Veronica

Tue Sep 28, 2010 4:07 am
Forum: Data Sufficiency
Topic: Integer
Replies: 2
Views: 1272

1. If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible? a. 20, b.40, c.50, d.80, e. 120 2. A certain business produced x rakes each month form Nov through Feb...

by Veronica

Sun Sep 26, 2010 11:22 pm
Forum: Problem Solving
Topic: 2 prolgems need help
Replies: 8
Views: 1724

What is the remainder when the positive integer n is divided by 3? 1. The remainder when n is divided by 2 is 1 2. The remainder when n + 1 is divided by 3 is 2 Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy? 1. She bought $4.4 worth of stamps 2. She bought an e...

by Veronica

Sun Sep 26, 2010 11:21 pm
Forum: Data Sufficiency
Topic: Integer
Replies: 3
Views: 1179

strenghthen question

Capuchin monkeys often rub their bodies with a certain type of millipede. Laboratory tests show that secretions from the bodies of these millipedes are rich in two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate capuchins. Some scientists hypothesize tha...

by Veronica

Sun Sep 26, 2010 8:47 pm
Forum: Critical Reasoning
Topic: strenghthen question
Replies: 7
Views: 1972

Please explain, thanks

Floating in the waters of the equatorial Pacific, an array of buoys collects and transmits data on long-term interactions between the ocean and the a tmosphere, interactions that effect global climate. A. atmosphere, interaction that affect B. atmosphere, with interactions affecting C. atmosphere th...

by Veronica

Sun Sep 26, 2010 8:34 pm
Forum: Sentence Correction
Topic: Please explain, thanks
Replies: 7
Views: 1671

Integer

What is the remainder when the positive integer n is divided by 3? 1. The remainder when n is divided by 2 is 1 2. The remainder when n + 1 is divided by 3 is 2 Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy? 1. She bought $4.4 worth of stamps 2. She bought an eq...

by Veronica

Sun Sep 26, 2010 8:26 pm
Forum: Data Sufficiency
Topic: Integer
Replies: 3
Views: 1179

Percentage

Last Sunday a certain store copies of Newspaper A for $1 each and copies of Newspaper B for $1.25 each, and the store sold no other newspapers that day. If r percent of the store's revenues from newspaper sales was from Newspaper A and if p percent of the newspapers that the store sold were copies o...

by Veronica

Sun Sep 26, 2010 8:13 pm
Forum: Problem Solving
Topic: Percentage
Replies: 2
Views: 1029

2 prolgems need help

1. If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible? a. 20, b.40, c.50, d.80, e. 120 2. A certain business produced x rakes each month form Nov through Feb ...

by Veronica

Sun Sep 26, 2010 8:09 pm
Forum: Problem Solving
Topic: 2 prolgems need help
Replies: 8
Views: 1724