## Search found 94 matches

#### What is the number of 360-degree rotations that...

###### Data Sufficiency

What is the number of 360-degree rotations that Tashi's unicycle wheel made while rolling 50 meters in a straight line without slipping? (1) The diameter of the unicycle wheel, including the tire, was 0.25 meters. (2) The unicycle wheel made ten 360-degree rotations per minute. The OA is A . I'm re...

by mbawisdom

Sat Mar 10, 2018 3:33 pm
Forum: Data Sufficiency
Topic: What is the number of 360-degree rotations that...
Replies: 1
Views: 362

#### A and B ran, at their respective rates, a race of 480m...

###### Problem Solving

A and B ran, at their respective rates, a race of 480m. In the first heat, A gives B a head start of 48m and beats him by 1/10th of a minute. In the second heat, A gives B a head start of 144m and is beaten by 1/30th of a minute. What is B's speed in m/s? A. 12 B. 14 C. 16 D. 18 E. 20 The OA is A ....

by mbawisdom

Sat Mar 10, 2018 2:15 pm
Forum: Problem Solving
Topic: A and B ran, at their respective rates, a race of 480m...
Replies: 4
Views: 612

#### A jury pool consists of 6 men and w women. If 2 jurors are s

###### Data Sufficiency

A jury pool consists of 6 men and w women. If 2 jurors are selected from the pool at random, is the probability that 2 men will be selected higher than the probability that 1 man and 1 woman will be selected? (1) w â‰¥ 3 (2) w < 6 What's the best way to determine whether statement 1 is sufficient? ...

by mbawisdom

Sat Mar 10, 2018 7:54 am
Forum: Data Sufficiency
Topic: A jury pool consists of 6 men and w women. If 2 jurors are s
Replies: 3
Views: 515

#### How many times will the digit 7 be written when listing the

###### Problem Solving

ardz24 wrote:How many times will the digit 7 be written when listing the integers from 1 to 1000?

(A) 110
(B) 111
(C) 271
(D) 300
(E) 304

Is there a strategic approach to this question? Can any experts help?
hi ardz24, how did you approach the question? Where did you run into difficulty?

by mbawisdom

Sat Mar 10, 2018 7:40 am
Forum: Problem Solving
Topic: How many times will the digit 7 be written when listing the
Replies: 3
Views: 374

#### In triangle XYZ, side XY, which runs perpendicular to side..

###### Problem Solving

In triangle XYZ, side XY, which runs perpendicular to side YZ, measures 24 inches in length. If the longest side of the triangle is 26 inches, what is the area, in square inches, of triangle XYZ? A. 100 B. 120 C. 140 D. 150 E. 165 The OA is B . I'm confused by this PS question, is it a right triang...

by mbawisdom

Sat Mar 10, 2018 6:29 am
Forum: Problem Solving
Topic: In triangle XYZ, side XY, which runs perpendicular to side..
Replies: 3
Views: 434

#### Gill drives 120 miles from Los Angeles to San Diego...

###### Problem Solving

Gill drives 120 miles from Los Angeles to San Diego to fetch a package. On her way there she drives at 40 miles per hour. On her way back she drives 50% faster. What is Gill's average velocity for the round trip? A. 24 miles per hour B. 48 miles per hour C. 50 miles per hour D. 53 1/3 miles per hou...

by mbawisdom

Sat Mar 10, 2018 6:14 am
Forum: Problem Solving
Topic: Gill drives 120 miles from Los Angeles to San Diego...
Replies: 3
Views: 338

#### Of the 300 employees of a certain company, 65 are...

###### Problem Solving

Of the 300 employees of a certain company, 65 are accountants. Two employees of the company will be selected at random. Which of the following is closest to the probability that neither of the employees selected will be an accountant? A. 0.3 B. 0.4 C 0.5 D. 0.6 E. 0.7 The OA is D . I solved this PS...

by mbawisdom

Sat Mar 10, 2018 6:08 am
Forum: Problem Solving
Topic: Of the 300 employees of a certain company, 65 are...
Replies: 4
Views: 460

#### If (x^3 - 2x^2 + x - 1)^2 - 1=(x - a) (x - b) (x - c) (x - d

###### Problem Solving

vinni.k wrote:Experts,

Regards
Vinni
No problems Vinni, thanks for engaging with us - hope we could be of some help!

by mbawisdom

Sat Mar 10, 2018 5:59 am
Forum: Problem Solving
Topic: If (x^3 - 2x^2 + x - 1)^2 - 1=(x - a) (x - b) (x - c) (x - d
Replies: 9
Views: 620

#### Juan goes out cycling outdoors. He travels at an average...

###### Problem Solving

Juan goes out cycling outdoors. He travels at an average speed of 15km/h, to the top of the hill where the midpoint of the trip is. Going down hill, Juan travels at an average speed of 20km/h. Which of the following is the closest approximation of Juan's average speed, in kilometers per hour, for t...

by mbawisdom

Sat Mar 10, 2018 5:35 am
Forum: Problem Solving
Topic: Juan goes out cycling outdoors. He travels at an average...
Replies: 3
Views: 402

#### In a certain city, 60 percent of the registered voters

###### Problem Solving

In a certain city, 60 percent of the registered voters are Democrats and the rest are Republicans. In a mayoral race, if 75 percent of the registered voters who are Democrats and 20 percent of the registered voters who are Republicans are expected to vote for Candidate A, what percent of the regist...

by mbawisdom

Sat Mar 10, 2018 5:20 am
Forum: Problem Solving
Topic: In a certain city, 60 percent of the registered voters
Replies: 2
Views: 707

#### If x, y, and z are positive numbers, is x - y < z

##### sss

lheiannie07 wrote:If x, y, and z are positive numbers, is x - y < z?

(1) x + y < z
(2) xy < z^2

What's the best way to determine whether statement 1 is sufficient?

OA A
How did you approach number 1?

x = x
x - y < x + y (since y is positive)
x - y < x + y < z
x - y < z

by mbawisdom

Sat Mar 10, 2018 5:12 am
Forum: Data Sufficiency
Topic: If x, y, and z are positive numbers, is x - y < z
Replies: 1
Views: 345

#### At the beginning of a class, a classroom has 3 empty chairs

###### Problem Solving

At the beginning of a class, a classroom has 3 empty chairs and all students are seated. No student leaves the classroom, and additional students equal to 20 percent of the number of students already seated enter the class late and fill the empty chairs. What is the total number of chairs in the cl...

by mbawisdom

Fri Mar 09, 2018 8:18 am
Forum: Problem Solving
Topic: At the beginning of a class, a classroom has 3 empty chairs
Replies: 6
Views: 608

#### Reading from the right, how many consecutive zeros, starting

###### Problem Solving

[GMAT math practice question] Reading from the right, how many consecutive zeros, starting with the units digit, appear in 29!? A. 5 B. 6 C. 7 D. 8 E. 9 The number of zeros will be determined by the number of 10's we can make from the factors. The number of 10's will be determined by how man 2's an...

by mbawisdom

Fri Mar 09, 2018 8:03 am
Forum: Problem Solving
Topic: Reading from the right, how many consecutive zeros, starting
Replies: 2
Views: 341

#### If xy does not equal zero, what is the value of xy

###### Data Sufficiency

If xy does not equal zero, what is the value of xy? (1) 2/x + 2/y = 3 (2) x^3 â€“ (2/y)^3 = 0 What's the best way to determine the sufficient statement? OA B Look at statement (1) first: 2/x + 2/y = 3 (2y + 2x)/xy = 3 xy = 2(x + y)/3 We don't know x + y so we can't solve for xy --> NOT SUFFICIENT! ...

by mbawisdom

Wed Mar 07, 2018 4:21 pm
Forum: Data Sufficiency
Topic: If xy does not equal zero, what is the value of xy
Replies: 2
Views: 2308

#### If two projectiles are launched at the same moment from...

###### Problem Solving

If two projectiles are launched at the same moment from 1320 miles apart and travel directly towards each other at 480 miles per hour and 510 miles per hour, respectively, how many minutes will it take for them to meet? A. 40 B. 44 C. 80 D. 88 E. 90 The OA is C . I'm really confused by this PS ques...

by mbawisdom

Wed Mar 07, 2018 3:36 pm
Forum: Problem Solving
Topic: If two projectiles are launched at the same moment from...
Replies: 3
Views: 446