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ricky01 wrote:What is the value of x in the attached figure where the line on the circles' base is tangent to both the circles with radius 2 and 1?
In the triangle, Base = 3, Height = 1
Hence the hypotenuse = x = (3^2 + 1^2) = √10

by OptimusPrep

Tue Jul 26, 2016 7:20 pm
Forum: Problem Solving
Topic: Geometry question
Replies: 6
Views: 1467

In how many ways can 480 be expressed as a product of two positive integers that are relatively prime (co-prime) to each other? A) 24 B) 12 C) 4 D) 8 E) 2 Correct answer: C Co-prime numbers: If two numbers have just a factor "1" in common, then the numbers are called co-prime. 480 = 2^5*3*5 The fol...

by OptimusPrep

Tue Jul 26, 2016 7:03 pm
Forum: Problem Solving
Topic: Number Theory; Difficulty: Hard
Replies: 4
Views: 1513

Of the 60 animals on a certain farm, 2/3 are either pigs or cows. How many of the animals are cows? (1) The farm has more than twice as many cows as pigs (2) The farm has more than 12 pigs Given: 40 animals are either pigs or cows. p + c = 40 Required: How many are cows. Statement 1: The farm has m...

by OptimusPrep

Tue Jul 26, 2016 6:56 pm
Forum: Problem Solving
Topic: Word problems :Minor Problem type
Replies: 3
Views: 902

According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make orange juice. How many 12-ounce can of the concentrate are required to prepare 200 6-ounces serving of orange juice? a)25 b)34 c)50 d)67 e)100 Try to bring every...

by OptimusPrep

Tue Jul 26, 2016 6:48 pm
Forum: Problem Solving
Topic: mixtures
Replies: 5
Views: 1457

For any positive integer n the length is defined as the number of prime numbers whose product equals n. So for 75 the length is 3 since 75 = 3 * 5 * 5. How many 2-digit numbers have a length of 6? a) None b) One c) Two d) Three e) Four For the length to be 6, the number of prime factors should be m...

by OptimusPrep

Tue Jul 26, 2016 6:42 pm
Forum: Problem Solving
Topic: numbers
Replies: 4
Views: 1084

Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore. A. Over the course of the eighteenth century, the average output of ironwork tr...

by OptimusPrep

Tue Jul 26, 2016 6:30 pm
Forum: Sentence Correction
Topic: Exam Pack 2 Question SC - Over the course of the eighteenth
Replies: 15
Views: 8187

16.Reporting that one of its many problems had been the recent extended sales slump in women’s apparel, the seven-store retailer said it would start a three-month liquidation sale in all of its stores. A. its many problems had been the recent B. its many problems has been the recently C. its many...

by OptimusPrep

Tue Jul 26, 2016 12:10 am
Forum: Sentence Correction
Topic: Tense
Replies: 2
Views: 829

Your mock scores shows a clear lack of fundamentals. In your preparation so far, how did you study? What material did you follow? 1. Did you take the test including AWA and IR? 2. Did you complete both the sections? (There is a high penalty if you do not complete a section) 3. Have you completed the...

by OptimusPrep

Tue Jul 26, 2016 12:05 am
Forum: Ask an MBA Admissions Consultant
Topic: Help ! To reschedule or not !
Replies: 1
Views: 941

Hi All, I have my GMAT in December - anyone in London wanting to study together? for info - 24YO working in London. would love to have some study partners for motivation! Best, hasan Hi Hasan, Seems like you are starting on your GMAT prep. Looking for a partner is a good way to keep yourself motiva...

by OptimusPrep

Tue Jul 26, 2016 12:02 am
Forum: Let's Meet Up
Topic: GMAT Study Group in London
Replies: 2
Views: 2093

Dear friends, I can understand OA is A, but anyone here can help me to clarify "in which" in A, here "which" stand for "interchange", or stand for "management, transfer, interchange" ? 80. Companies are relying more and more on networked computers for such critical tasks as inventory management, el...

by OptimusPrep

Tue Jul 26, 2016 12:01 am
Forum: Sentence Correction
Topic: SC -via computer VS on paper
Replies: 1
Views: 833

Because the cork stoppers in wine bottles can leak, crumble, or become moldy, winemakers must often discard a significant proportion of their inventory of bottled wine. Bottlemaster, Inc., produces a plastic stopper that cannot leak, crumble, or mold. Bottlemaster's plastic stopper is available to ...

by OptimusPrep

Mon Jul 25, 2016 11:56 pm
Forum: Critical Reasoning
Topic: Because the cork stoppers in wine bottles can leak
Replies: 2
Views: 1164

A female meadow vole can produce a fresh litter of about five pups every three weeks if she chooses to breed at maximum speed, but they begin suppressing pup production from the moment they become conscious of nearby voles in excess. A)they begin suppressing pup production from the moment they beco...

by OptimusPrep

Sun Jul 24, 2016 10:33 pm
Forum: Sentence Correction
Topic: A female meadow vole can produce a fresh litter
Replies: 1
Views: 1803

I am in Northville, and looking for study partners. I work fulltime, I am old, and last time I wrote an entrance exam was long time back :-). Nonetheless, I am enthusiastic. Let me know. Hi ProfX, Seems like you are starting on your GMAT prep. Looking for a partner is a good way to keep yourself mo...

by OptimusPrep

Thu Jul 21, 2016 8:42 pm
Forum: Let's Meet Up
Topic: Detroit area study group
Replies: 1
Views: 1000

Hello, I took the Kaplan free GMAT test recently and got 660 (quant 47, V 33). I am a little disappointed since I thought I'd do better than that. My target is at least 750 with a perfect score in quant. How should I study and for how long? I have the OG and Princeton Review books (3 books). Please...

by OptimusPrep

Thu Jul 21, 2016 8:40 pm
Forum: The GMAT Avengers Study Group
Topic: Kaplan GMAT test score 660, Target score 750
Replies: 4
Views: 2291

Hi I took my first mock today (Mba.com Mock 1) and scored a 660. Q-49, V-30,IR -7 My target score is 700+ and plan to take the GMAT in September (so have about 1.5 months to prepare) I require suggestions to improve my verbal score. SC and CR especially. Also, my time management during the verbal s...

by OptimusPrep

Thu Jul 21, 2016 8:33 pm
Forum: The GMAT Avengers Study Group
Topic: First official mba.com mock:660. Way ahead?
Replies: 2
Views: 1429