Archive for September, 2008
Yesterday, we posted a 700+ level GMAT question. Below is the answer and explanation. How’d you do?
Answer: E
Explanation:
In order to find the sum of consecutive numbers, we always follow three steps:
1. Find the number of numbers
2. Find the middle number
3. Multiply
Using the 3 steps -
1. Find the number of numbers:
The multiples of five between 23 and 92 are really the numbers starting from 25 and ending with 90. To find the number of numbers, subtract 25 from 90, divide by 5, and add 1:
90 – 25 = 65
65/5 = 13
13 + 1 = 14
2. Find the middle number:
The middle number between 25 and 90 is the average of 25 and 90:
25 + 90 = 115
115/2 = 57.5
3. Multiply:
57.5*14 = 805
September 24th, 2008
Every Tuesday we post a 700+ level GMAT question here on our blog, and post the answer and explanation the following day. Do you have what it takes?
What is the sum of the multiples of 5 between 23 and 92, inclusive?
A) 14
B) 65
C) 70
D) 747.5
E) 805
September 23rd, 2008
Yesterday, we posted a 700+ level GMAT question. Below is the answer and explanation. How’d you do?
Answer: C
To be a perfect square, you must be able to take the square root of Q. Practically, that means both x and y need to be even numbers.
Statement 1: We learn that Q has at least 4 3’s and 2 7’s in its prime factors, but we don’t know there aren’t more than that. Q could have 5 3’s, which case y would be 5 and you would not be able to square root Q.
Statement 2: Since 243 is 35 and 343 is 73, Q has less than 5 3’s, and less than 3 7’s in its prime factors. But again, y could be any number less than 5 and x any number less than 3, even or odd.
Together – Q has exactly 4 3’s and 2 7’s in its prime factors and is therefore a square of an integer.
September 17th, 2008
Every Tuesday we post a 700+ level GMAT question here on our blog, and post the answer and explanation the following day. Do you have what it takes?
Q=3y7z. Is Q a square of an integer?
1) 81 and 49 are factors of Q.
2) 243 and 343 are NOT factors of Q.
September 16th, 2008
Huh? For free? Yeah right, you may be thinking. But seriously, you may be closer to a scholarship opportunity than you realize, and with some work and planning, you may just find a way to actually get your MBA fully paid for. With the economy being what it is there’s no better time than now to think outside the box when it comes to saving money. Your business school expense is no exception.
Getting a scholarship or fellowship award surely takes some hard work, but when you’re talking upwards of $150K for two years of b-school, it may make you think twice. And consider this: the difference between having a mountain of debt when you graduate and not having student loan debt could make a significant impact on some very important post graduate decisions – an entrepreneurial venture vs. a corporate job, lifestyle choices, where you decide to live, and a whole host of other life choices.
Business Week gives several great tips in Monday’s article “How to go to Business School for Free”. The article gives several pointers for winning scholarships, but the first tip is probably the most important one – start thinking about and planning for your MBA early. This gives you the chance to consider various schools and give some good thought to which ones are the best fit for you. You also need time to become familiar with the scholarships and fellowships available at each school. Planning ahead may also give you the chance to add something to your experience that could enhance your application – volunteering, a key leadership role, etc. Being ready to apply for the first round of applications is also imperative as in this case and many others, the early bird gets the worm!
Click here to read the full article.
September 10th, 2008
Yesterday, we posted a 700+ level GMAT question. Below is the answer and explanation. How’d you do?
Answer: C
The average of the three numbers is 44, so they must add up to 132.
We know the median is 42, so the numbers, arranged in order, look like:
x, 42, y
We want the smallest number that the largest number can be, meaning, we want the smallest value of y.
To get the smallest value of y, we need x to be as large as it can be. 42 is the median, which means it’s in the middle, but it does not mean that the largest x can be is 41. x can be 42 as well. If that is the case, then 42 + 42 + y = 132, or y = 48.
September 10th, 2008
Every Tuesday we post a 700+ level GMAT question here on our blog, and post the answer and explanation the following day. Do you have what it takes?
The average of three positive integers is 44 and the median is 42. What is the least possible value of the greatest of the three numbers?
A) 6
B) 42
C) 48
D) 89
E) 128
September 9th, 2008