If a < b < c < d and a, b, c, and d all are powers of 2

January 11, 2017, 2:53 pm

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If a < b < c < d and a, b, c, and d all are powers of 2 and all are positive integers. What is the value of d?

(1) a + b + c + d = 170
(2) abcd = 216

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Where to learn how to solve mixture questions?

January 11, 2017, 4:00 pm

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Hi everyone!

Question: Is there a place, website, youtube channel, whatever, that has ALL of the information required to learn to solve mixture questions?

I am asking because every time I try to learn them, I think "this Q will never come up on the GMAT anyways, I'm not gotta google stuff for a week to learn to solve something I most likely will never see"

So for the lazy people like me, can you tell me a page that just has all of the necessary information?

Age Problem

January 11, 2017, 5:20 pm

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The product of Ron's age, in years, and half of George's age, in years, is 42. If Ron is 5 years older than George is, then how old is Ron ?

(A) 7
(B) 8
(C) 9
(D) 10
(E) 12

Geometry

January 11, 2017, 7:40 pm

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What is the length of minor arc AB in the circle above which has a diameter of CD equaling 12?

(A) 2
(B) 4
(C) 6
(D) 8
(E) It cannot be determined with the information given.

Geometry

January 11, 2017, 8:02 pm

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a dart is thrown and lands somewhere in the circle, what is the
probability that it will not fall within the inscribed square? (Assume that the
point in the circle where the dart lands is completely random.) (19/5/2003)
(A) 2x
(B) \pi(x) 2x
(C) \pi(x) \sqrt{2}x
(D) 1 \frac{2}{\pi}
(E) 1 \frac{2}{x}

The chart above represents the number of students at five schools, eac

January 11, 2017, 11:10 pm

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The chart above represents the number of students at five schools, each of which has branches in each of four towns. In which town is the standard deviation of the number of students at each school the least?

A. Town A
B. Town B
C. Town C
D. Town D
E. Cannot be determined.

[Reveal] Spoiler:

Attachment:

2017-01-12_1108.png

The chart above represents the number of students at five schools, eac

January 11, 2017, 11:12 pm

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The chart above represents the number of students at five schools, each of which has branches in each of four towns. In which town is the standard deviation of the number of students at each school the greatest?

A. Town A
B. Town B
C. Town C
D. Town D
E. It cannot be determined from the information given.

If -2< x

January 12, 2017, 5:22 am

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If -2< x <11 , then which of the following must me true?

A. x > -1.9999999999
B. x < 10.999999999
C. \(x^3\) > 0
D. \(x^2\) < 100
E. -100<x<20

Kudos for right solutions

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Is xy < 4 ? (1) x + y < 2 (2) x < 2 , y > 2

January 12, 2017, 5:56 am

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Is xy < 4 ?

(1) x + y < 2
(2) x < 2 and y > 2

Is a b ?

January 12, 2017, 5:57 am

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Is a b ?

(1) a +b > 2
(2) a/b < 0

Is x between 0.1 and 0.7 ? (1) 250x > 50 (2) 300x < 150

January 12, 2017, 5:57 am

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Is x between 0.1 and 0.7 ?

(1) 250x > 50
(2) 300x < 150

If 1 y 0 and z -2 , then which of the following cannot be the valu

January 12, 2017, 5:58 am

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If 1 y 0 and z -2 , then which of the following cannot be the value of y - z?

A. 3
B. 2.75
C. 2.5
D. 2
E. 1.5

If 9 > g > 0 and 10 < h < 7 , then which of the following expresses

January 12, 2017, 6:00 am

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If 9 > g > 0 and 10 < h < 7 , then which of the following expresses all possible values of the product gh?

A. 70 > gh > 90
B. 63 > gh > 90
C. 63 > gh > 0
D. 0 > gh > 90
E. 0 > gh > 63

Is 3x + y > 3?

January 12, 2017, 6:01 am

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Is 3x + y > 3?

(1) y/3 > 1
(2) x > 1/3

Is xy > 25 ? (1) x < 5 and y < 5 (2) 2xy > 60

January 12, 2017, 6:03 am

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Is xy > 25 ?

(1) x < 5 and y < 5
(2) 2xy > 60

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Is non-negative integer x an even integer?

January 12, 2017, 7:35 am

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Is non-negative integer x an even integer?
1)x<k, where k is the number of digits in x.
2)k=1

Self made

For all positive integers m, (m)=3m when m is odd and (m)= 1/2m when m

January 12, 2017, 8:28 am

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This topic have been merged with: http://gmatclub.com/forum/topic-125937.html

A number of apples and oranges are to be distributed evenly among a nu

January 12, 2017, 10:26 am

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A number of apples and oranges are to be distributed evenly among a number of baskets. Each basket will contain at least one of each type of fruit. If there are 20 oranges to be distributed, what is the minimum number of apples needed so that every basket contains less than twice as many apples as oranges?

(1) If the number of baskets were halved and all other conditions remained the same, there would be
twice as many oranges in every remaining basket.

(2) If the number of oranges were halved, it would no longer be possible to place an orange in every
basket.

Please help with this DS problem.

Area of a Triangle

January 12, 2017, 4:31 pm

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Following are the vertexes of a triangle, (0,0), (0,a) and (a,b)
What is the area of triangle

a) Diagonal of the triangle is 10
b) a and b are positive integers

SET Question

January 12, 2017, 4:57 pm

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In school V, all students must take at least one of Mathematics, Physics, or Biology. If none of the students took 3 classes, the number of students who took Mathematics class is 18, the number of students who took Physics class is 23, and the number of students who took Biology class is 20. And also 3 students took both Mathematics class and Physics class, 8 students took both Physics class and Biology class, and 6 students took both Biology class and Mathematics class. What is the total number of students in school V?

A. 11
B. 22
C. 33
D. 44
E. 55