## Search found 3835 matches

i understand till here, why did we do after that 8 +8? Because the question said "... the store packs the notepads in packages that contain either 3 notepads of the same size and the same color or 3 notepads of the same size and of 3 different colors " Those are two different scenarios. For each of...

- by [email protected]

Wed Mar 13, 2013 12:03 pm- Forum: Problem Solving
- Topic: GMAT PREP PS question
- Replies:
**7** - Views:
**1833**

Approach 1 ----------- Let J=18 at start of babysitting C's maximum age at that time=9 Jane's has stopped babysitting at 22,so the max age of C at that time will be 11. J's current age = 32 After 10 yrs the C's age will be 11+10=22 Answer = 22 Approach 2 ----------- J started baby sitting started a...

- by [email protected]

Fri Mar 08, 2013 3:48 am- Forum: Problem Solving
- Topic: Word Problem - Ages question
- Replies:
**2** - Views:
**1016**

rather than having to remember when to flip signs, i'm trying to think of a hard and fast rule i can apply to both absolute value equations and inequalities. again, could an instructor verify that what i'm doing is correct? You're not doing anything wrong except that redundancy part. But before rem...

- by [email protected]

Fri Mar 08, 2013 1:12 am- Forum: GMAT Math
- Topic: how to solve absolute values and absolute value inequalities
- Replies:
**12** - Views:
**5257**

I'm assuming this is the problem you are talking about... r s t u v w x y z Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r? 1) v + z = 6 2) s + t + u + ...

- by [email protected]

Fri Mar 08, 2013 12:32 am- Forum: Data Sufficiency
- Topic: Arithmetic Properties of Number
- Replies:
**2** - Views:
**763**

2.a. y + 14 = -2 y = -16 2.b. since the value inside the absolute value brackets can be negative, i mutliply everything within the absolute value brackets by negative 1 -y - 14 = 2 ... i know that 2.a. and 2.b. actually are equal to each other, but is one way the correct way of doing absolute value...

- by [email protected]

Fri Mar 08, 2013 12:20 am- Forum: GMAT Math
- Topic: how to solve absolute values and absolute value inequalities
- Replies:
**12** - Views:
**5257**

For what value of x will the expression âˆš(-2(x+1) - (x-2)) not be a real number? The expression will not be real only if the expression under root is negative. So, (-2(x+1) - (x-2)) < 0 --> 2(x + 1) + (x - 2) > 0 --> 3x > 0 --> x > 0 Only possible answer is x = 0.5 [spoiler] The correct answer is...

- by [email protected]

Thu Mar 07, 2013 11:09 pm- Forum: Problem Solving
- Topic: Real Numbers - Arithematic
- Replies:
**1** - Views:
**683**

Q. if R is an integer, is R evenly divisible by 3 A. 2R is evenly divisible by 3 B. 3R is evenly divisible by 3 In simple words, "evenly divisible" means 'divisible'. Statement 1: 2R is divisible by 3. As 2 is not a multiple of 3, R must be a multiple of 3. Sufficient Statement 2: 3R is divisible b...

- by [email protected]

Thu Mar 07, 2013 9:58 pm- Forum: Data Sufficiency
- Topic: Evenly Divisible ??
- Replies:
**2** - Views:
**2012**

No. The reverse is not true.rjain84 wrote:Can we also say the same for the given product? Given the product of two numbers, their sum will be maximum when both are equal?

To illustrate with a simple example, take xy = 4 ---> (4 + 1) > (2 + 2)

- by [email protected]

Thu Mar 07, 2013 11:41 am- Forum: Problem Solving
- Topic: optimization
- Replies:
**9** - Views:
**1362**

Algebraic Method: (x + y)Â² = (xÂ² + yÂ² + 2xy) = (100 + 2xy) ---> (x + y) = âˆš(100 + 2xy) To maximize (x + y), we need to maximize xy which we will do by maximizing xÂ²yÂ². Now, remember this rule if you don't know it yet, Given the sum of two numbers, their product will be maximum when they are ...

- by [email protected]

Thu Mar 07, 2013 11:24 am- Forum: Problem Solving
- Topic: optimization
- Replies:
**9** - Views:
**1362**

If x^2+y^2 = 100, and xâ‰¥0, and yâ‰¥0, the maximum value of x + y is xÂ² + yÂ² = 100 Hence, 0 â‰¤ x â‰¤ 10 and 0â‰¤ y â‰¤ 10 Some obvious possible values for x and y are {x = 10, y = 0} or {x = 6, y = 8} In first case, (x + y) = 10 ---> Discard option 1 In second case, (x + y) = 14 ---> Discard op...

- by [email protected]

Thu Mar 07, 2013 11:12 am- Forum: Problem Solving
- Topic: optimization
- Replies:
**9** - Views:
**1362**

Would you be able to give me an example of how to solve the problem with a valid data set? Let us take an example question like " The population of a town is 6,250,000. If the ratio of number of males to number of females in the town is 14:11, how many male are there in the town? Also, what percent...

- by [email protected]

Thu Mar 07, 2013 10:25 am- Forum: Data Sufficiency
- Topic: Population Ratio
- Replies:
**4** - Views:
**941**

Hi there I remember coming across a question in my recent GMAT test which went as follows; Population - 6,754,000 Ratio M:F - 14:9 The question was how many males are there and what percentage of the population are females? Thank you so much. I'm afraid you don't remember the numbers properly. Beca...

- by [email protected]

Thu Mar 07, 2013 9:33 am- Forum: Data Sufficiency
- Topic: Population Ratio
- Replies:
**4** - Views:
**941**

4 when subtracted from 10 yields 6 which is a multiple of 6.. (6*1)..this is the reasoning.. is it wrong? No, that is correct. But the question asks " ...which of the following could NOT be a possible value of M + N? " And as Mitch has shown, (M + N) will be 4 more than a multiple of 6. Hence, the ...

- by [email protected]

Thu Mar 07, 2013 7:52 am- Forum: Problem Solving
- Topic: Remainders
- Replies:
**6** - Views:
**1329**

If x and y are distinct factors of 24, then which of the following CANNOT be a factor of 24? I. (x+y)Â² II. xÂ²âˆ’yÂ² III. xy+yÂ² The possible values of x and y are : 1, 2, 3, 4, 6, 8, 12, and 24 also x â‰ y Option I This is a perfect square. The only factors of 24 that are perfect squares are 1 a...

- by [email protected]

Thu Mar 07, 2013 3:30 am- Forum: Problem Solving
- Topic: Factors of 24
- Replies:
**2** - Views:
**1263**

For the third question I thought the answer was 5:7 as [40000/(1-0.2)]: [100000/(1+0.4)] is roughly equal to 50000:71000.. I could be completely wrong though. Thank you for pointing out that we can approximate the actual answer to select the best answer. I've modified my reply accordingly. However,...

- by [email protected]

Wed Mar 06, 2013 10:51 pm- Forum: Problem Solving
- Topic: Gmat question help!
- Replies:
**6** - Views:
**12111**