Search found 23 matches
Let no. of umbrella's bought be u, and no. of raincoats bought be r. No. of people who can travel using umbrella = 2u No. of people who can travel using raincoat = r Speed of people using raincoat = 100/20 = 5 m/min Speed of people using umbrella = 1/3 * 5 = 5/3 m/min Cost of raincoat = Rs.100 Cost ...
- by vkb001
Tue Feb 05, 2013 5:50 pm- Forum: Problem Solving
- Topic: Raincoats and umbrellas
- Replies: 3
- Views: 3538
The question doesn't say how fast the passenger train (PT) is relative to the freight train (FT). It could be slower, or faster. So, if the PT is slower, you'd get a negative relative speed w.r.t. the FT (i.e. p-25 < 0). If PT is same or faster, the relative speed w.r.t. the FT would be positive (i....
- by vkb001
Tue Feb 05, 2013 5:24 pm- Forum: Problem Solving
- Topic: a passenger train and a freight train
- Replies: 1
- Views: 1100
The Truffles problem is a combination problem, and the Plane problem is a permutation one. 1. Truffles Think of it this way: You have 5 types. To be able to make a box, you need to choose 2 different types. This is: 5C2 = 5!/2!*(5-2)! = 5!/2!3! Alternatively, let's say you need to fill two positions...
- by vkb001
Tue Feb 05, 2013 5:13 pm- Forum: Problem Solving
- Topic: Factorials: When to Divide by Another Factorial versus NOT?
- Replies: 11
- Views: 2791
a. Average speed is total distance travelled, divided by total time taken to travel that total distance. b. Distance = Speed * Time In Question 1: To find average speed, you have total time given. You need total distance travelled. Therefore, you use formula (b), where you MULTIPLY speed and time, t...
- by vkb001
Tue Feb 05, 2013 4:56 pm- Forum: Problem Solving
- Topic: Difference between two rate questions!
- Replies: 2
- Views: 1130
I guess you were careful in defining your strategy, but multiplied anyhow. We know that x≠0. This means x < 0 or x > 0. (i) If x = y, (x^2+1)/x = (y^2+1)/y = y + 1/y If x > 0, or y > 0 (since x=y), then 1/y > 0 ==> y + 1/y > y If x < 0, or y < 0 (since x=y), then 1/y < 0 ==> y + 1/y < y It is beca...
- by vkb001
Wed Jan 30, 2013 6:11 pm- Forum: Data Sufficiency
- Topic: Manhattan Inequalities Chapter 12, DS Problem 12
- Replies: 3
- Views: 1148
- by vkb001
Wed Jan 30, 2013 5:59 pm- Forum: Problem Solving
- Topic: Three Set formula
- Replies: 2
- Views: 1114
Initially, every word is flashed for a second. From then, the interval for which each word is put off differs. So, the time length till the next flash for each of the words is 1+5/2, 1+17/4, 1+41/8 = 3.5, 5.25, 6.125. We need an integer number of each of these durations so that the cumulative durati...
- by vkb001
Wed Jan 30, 2013 5:56 pm- Forum: Problem Solving
- Topic: flash lights
- Replies: 1
- Views: 9842
W = amount received per week C = capital S = wage per worker 52W + C = 45S ---- Equation (1) 13W + C = 60S ---- Equation (2) If X men can be maintained for 26 weeks, then the new equation would be 26W + C = X ---- Equation (3) Equation (1) - Equation (2): 39W = -15S ==> 13W = -5S ---- Equation (4) E...
- by vkb001
Wed Jan 30, 2013 5:30 pm- Forum: Problem Solving
- Topic: wages problem
- Replies: 2
- Views: 2935
If T is the total number of interns, Number of interns with less than 6 hours of sleep and feeling tired = 0.75*T (given) Number of interns with less than 6 hours of sleep = 0.8*T (given) Therefore, number of interns with less than 6 hours of sleep and NOT feeling tired = (0.8 - 0.75)*T = 0.05*T Num...
- by vkb001
Mon Jan 14, 2013 4:49 pm- Forum: Problem Solving
- Topic: Tired VS Not tired problem
- Replies: 4
- Views: 1151
The one that worked for me was to review each question (correct or not). If my answer is correct, I can check if my approach is efficient or not (the answers given in books may not necessarily be efficient). If my answer is wrong, I'll know how to get to the write answer.
- by vkb001
Sat Jan 12, 2013 6:35 pm- Forum: GMAT Math
- Topic: How to review question effectively?
- Replies: 5
- Views: 1734
I don't have OG with me, so can't look at answers given there.
And, I don't understand your concern. You seem to be fine with breaking down 96 into factors. What are you looking for?
- by vkb001
Sat Jan 12, 2013 6:31 pm- Forum: Problem Solving
- Topic: OG Quant #163
- Replies: 2
- Views: 922
Answer is B.
1/2^n > 0.01
=> 1/2^n > 1/100
=> 2^n < 100
find a value of n for which 2^n is less than 100. You can either do this by going over each of the choices here, or figure it out. At n = 6, 2^n = 64 < 100. At n = 7, 2^n = 128 > 100.
- by vkb001
Sat Jan 12, 2013 6:22 pm- Forum: Problem Solving
- Topic: OG QUANT #86- Operations w/ rational # (exponents)
- Replies: 5
- Views: 1820
- by vkb001
Thu Aug 25, 2011 8:48 pm- Forum: Ask Clear Admit
- Topic: Please evaluate my profile
- Replies: 3
- Views: 1326
Please evaluate my profile
24/male/Indian Education: IIT graduate (bachelors degree) with GPA 3.6/4. Work Experience: 2 years at a leading software company (product development). Promoted once. GMAT Score: 740 Leadership experience: At college - Head of student organization, Organized tech competitions at college. At work - S...
- by vkb001
Thu Aug 25, 2011 8:51 am- Forum: Ask Clear Admit
- Topic: Please evaluate my profile
- Replies: 3
- Views: 1326
- by vkb001
Sun Jun 12, 2011 7:15 pm- Forum: Ask an MBA Admissions Consultant
- Topic: Request for Profile Evaluation
- Replies: 3
- Views: 1127