Search found 23 matches
The question states: if number t is in the set, then number (t+2) will also in the set. -1 is in set So the set will have -1, -1+2 = 1, 1+2 =3, 3+2=5 and so on. -1 will be smallest element in the set. (-1,1,3,5,7) -3 could also be in set but it is not definite that it will always be in set. i.e set...
- by jkwan
Wed Jan 14, 2009 10:59 pm- Forum: Problem Solving
- Topic: Easy but trick question?
- Replies: 5
- Views: 1847
16 marbles
A jar contains 16 marbles, of which 4 are red, 3 are blue, and the rest are yellow. If 2 marbles are to be selected at random from the jar, one at a time without being replaced, what is the probability that the first marble selected will be red and the second marble selected will be blue? A. 3/64 B....
- by jkwan
Wed Jan 14, 2009 10:40 pm- Forum: Problem Solving
- Topic: 16 marbles
- Replies: 2
- Views: 5937
What's the quick and dirty way of solving Qs like these 2?
I know GMAT put the following questions on the test with no intention of you actually solving them (no messy math),..so I was wondering if there's an easy way to solve questions like these two? Insights are appreciated! Question #1: If 10^50 – 74 is written as an integer in base 10 notation, what is...
- by jkwan
Wed Jan 14, 2009 10:17 pm- Forum: Problem Solving
- Topic: What's the quick and dirty way of solving Qs like these 2?
- Replies: 1
- Views: 1055
Easy but trick question?
A set of numbers has the property that for any number t in the set, t + 2 is in the set. If –1 is in the set, which of the following must also be in the set? I. -3 II. 1 III. 5 A. I only B. II only C. I and II only D. II and III only E. I, II, and III The answer is D... I can't seem to figure out wh...
- by jkwan
Wed Jan 14, 2009 10:10 pm- Forum: Problem Solving
- Topic: Easy but trick question?
- Replies: 5
- Views: 1847
Probability
This is probably a really easy question, but I can't seem to figure it out! Looks like I have a LONG way to go until I can beat the gmat :( ----------- A gardener is going to plant 2 red rosebushes and 2 white rosebushes. If the gardener is to select each of the bushes at random, one at a time, and ...
- by jkwan
Wed Jan 14, 2009 10:07 pm- Forum: Problem Solving
- Topic: Probability
- Replies: 1
- Views: 1067
In the xy-plane, point (r, s) lies on a circle with center at the origin. What is the value of r2 + s2? (1) The circle has radius 2. (2) The point (√2, -√2) lies on the circle. Answer is D 1) We know radius of circle Hence r^2+s^2=2^2 = 4 2) Distance between two points is Sqrt o...
- by jkwan
Wed Jan 14, 2009 2:01 pm- Forum: Data Sufficiency
- Topic: HELP please..
- Replies: 7
- Views: 4110
HELP please..
Which of the following is the correct answer? ------------------ In the xy-plane, point (r, s) lies on a circle with center at the origin. What is the value of r2 + s2? (1) The circle has radius 2. (2) The point (√2, -√2) lies on the circle. A. Statement (1) ALONE is sufficient, ...
- by jkwan
Wed Jan 14, 2009 1:33 pm- Forum: Data Sufficiency
- Topic: HELP please..
- Replies: 7
- Views: 4110
Help with this CR question...
What do you think is the correct answer, and why? :?: Thanks Which of the following most logically completes the argument below? Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere mo...
- by jkwan
Tue Jan 13, 2009 12:29 pm- Forum: Critical Reasoning
- Topic: Help with this CR question...
- Replies: 6
- Views: 1754