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Beat The GMAT Admin - Pls Contact Me!

Hi, My name is Joshua Weiss, I am the CEO of TeliApp, a mobile application development firm. I am also a Beat The GMAT member. When I was studying for the gmats I used this forum as my gateway to everything and anything GMAT related. I am tremendously greatful to all the awesome people who helped me...

by jzw

Tue Mar 19, 2013 9:25 am
Forum: Suggestions and Feedback
Topic: Beat The GMAT Admin - Pls Contact Me!
Replies: 0
Views: 1698

probability

A box contains 100 balls, numbered from 1 to 100. If three balls are selected @ random and without replacement from the boc, what is the probability that the sum of the three numbers on the balls selected from the box will be odd? (a) 1/4 (b) 3/8 (c) 1/2 (d) 5/8 (e) 3/4 Ok. So 50 odd and 50 even. so...

by jzw

Wed Mar 21, 2012 11:33 am
Forum: Problem Solving
Topic: probability
Replies: 4
Views: 778

the famous retailer profits paradox revisited

Everybody knows the following one: A discount retailer of basic household necessities employs thousands of people and pays most of them at the minimum wage rate. Yet following a federally mandated increase of the minimum wage rate that increased the retailer’s operating costs considerably, the ret...

by jzw

Wed Mar 21, 2012 8:30 am
Forum: Critical Reasoning
Topic: the famous retailer profits paradox revisited
Replies: 1
Views: 1132

The rule of finding the potential third side of any triangle when given the other two lengths is: The third side must be smaller than the sum and greater than the difference. So for this example, 8-3=5 8+3=11 Since the third side must be smaller than the sum, it has to be less than 11. So anything 1...

by jzw

Wed Mar 21, 2012 6:14 am
Forum: Problem Solving
Topic: basic question
Replies: 9
Views: 1227

GMAT program practice question with units digits

Here is a problem on the GMAT practice questions. I solved it a different way, and need to know if I stumbled upon the answer by accident or if what I did would hold true if a different version of the question was on the real test. "If X is a positive integer, and if the units digit of X^2 is 9 and ...

by jzw

Wed Mar 21, 2012 6:09 am
Forum: Problem Solving
Topic: GMAT program practice question with units digits
Replies: 3
Views: 2128

area of equilateral triangle "shortcut" tidbit

Only use it if you get why it is this way so that you don't accidentally apply it to the wrong kind of triangle. Area of Equilateral Triangle = √3/4 * X^2. Why? 1. An equilateral triangle is one where all sides are equal to each other (let's call each side "X" since it can be any number) and all a...

by jzw

Mon Mar 19, 2012 7:00 am
Forum: Problem Solving
Topic: area of equilateral triangle "shortcut" tidbit
Replies: 0
Views: 3404

I wish I could think like you do Mitch! You see these questions and you make a "tough" rate problem look like it's really a simple logic question. Like - of course Zelda's traveled 16 miles by 1pm, and since they're traveling towards each other we all know to combine the rates for the remaining dist...

by jzw

Mon Mar 19, 2012 5:12 am
Forum: Problem Solving
Topic: rate problem using the chart/box method?
Replies: 6
Views: 1454

Mitch - u always make it all look so easy :)

by jzw

Sun Mar 18, 2012 5:40 pm
Forum: Problem Solving
Topic: rate issue with box method and combines rates
Replies: 6
Views: 1589

I was asked how I did it by someone privately so I'm posting it here. Attached you'll see how originally I tried to use my trusty box method, but for this type of rate problem I couldn't figure out how to take the box method to the next step. So, I took the information I used by using the box method...

by jzw

Sun Mar 18, 2012 4:08 pm
Forum: Problem Solving
Topic: rate issue with box method and combines rates
Replies: 6
Views: 1589

that's correct - what was tripping me up was I was putting zelda's time as X and frank's time as t-2. can you tell me what signaled to you to make zelda's +2 instead of frank's -2?

by jzw

Sun Mar 18, 2012 1:49 pm
Forum: Problem Solving
Topic: rate problem using the chart/box method?
Replies: 6
Views: 1454

rate issue with box method and combines rates

It takes 6 beavers 10 hours to build a certain dam, working at a uniform rate. If six beavers start to build the same dam at noon, and one beaver per hour is added beginning at 6:00 PM, at what time will the dam be complete? (a) 7:40 PM (b) 8:00 PM (c) 8:20 PM (d) 8:40 PM (e) 9:00 PM i got e, but i ...

by jzw

Sun Mar 18, 2012 1:11 pm
Forum: Problem Solving
Topic: rate issue with box method and combines rates
Replies: 6
Views: 1589

rate problem using the chart/box method?

The distance from the south entrance to the north entrance of a certain straight bicycling trail is 88 miles. At 11:00 AM, Zelda starts biking from the north entrance towards the south entrance of the trail. At 1:00 PM, Frank starts biking from the south entrance towards the north entrance of the tr...

by jzw

Sun Mar 18, 2012 12:34 pm
Forum: Problem Solving
Topic: rate problem using the chart/box method?
Replies: 6
Views: 1454

err - whoops. or - oh yeah, I did that on purpose to see if you were paying attention :) that's exactly the kind of simple, bumbling, idiotic, stupid, error I'll make on test day that could totally trip me up. it sucks when you know how to do it and then get the wrong answer because of some ridiculo...

by jzw

Sun Mar 18, 2012 11:46 am
Forum: Problem Solving
Topic: What is wrong with my approach ?
Replies: 10
Views: 951

Ok - here is what I did and why I did it. Please confirm whether the answer is correct. This question is different than other probability questions in that it is also a combination problem. The first thing we need to do in any probability question is to find out what are the desired outcomes and put...

by jzw

Sun Mar 18, 2012 11:34 am
Forum: Problem Solving
Topic: What is wrong with my approach ?
Replies: 10
Views: 951

garryrother wrote:Hi Folks,

Confused a bit !
What about -13, -15 and -17?

Am i missing anything overhere?

Thanks!
You would hypothetically need to consider negatives in a consecutive integer question if you saw one in the answer choices.

by jzw

Sun Mar 18, 2012 10:35 am
Forum: Problem Solving
Topic: consecutive numbers
Replies: 9
Views: 1271