Search found 6 matches
- by albema
Wed Dec 10, 2008 3:07 pm- Forum: Problem Solving
- Topic: tough sequences
- Replies: 5
- Views: 7228
Re: ABSOLUTE VALUE YES/NO DS
cramya wrote:Is |X-1| < 1 ?
1) (x-1)^2 <= 1
2) x^2 - 1 > 0
Source: 2008 GMAT Club
OA:E
But 1) tells us that 0<X<2 so A is sufficient
Please explain am I right?
- by albema
Wed Dec 10, 2008 3:01 pm- Forum: Data Sufficiency
- Topic: ABSOLUTE VALUE YES/NO DS
- Replies: 4
- Views: 1660
Median
A certain list consists of 3 different numbers. Does the median of the 3 numbers equal the average (arithmetic mean) of the 3 numbers? (1) The range of the 3 numbers is equal to twice the difference between the greatest number and the median. (2) The sum of the 3 numbers is equal to 3 times one of t...
- by albema
Wed Dec 10, 2008 2:44 pm- Forum: Data Sufficiency
- Topic: Median
- Replies: 6
- Views: 7602
integers
Is the integer n odd?
(1) n is divisible by 3.
(2) 2n is divisible by twice as many positive integers as n.
B
- by albema
Wed Dec 10, 2008 2:43 pm- Forum: Data Sufficiency
- Topic: integers
- Replies: 1
- Views: 1423
tough sequences
How many different 6-letter sequences are there that consist of 1 A, 2 B’s, and 3 C’s ?
A. 6
B. 60
C. 120
D. 360
E. 720
B
- by albema
Wed Dec 10, 2008 2:40 pm- Forum: Problem Solving
- Topic: tough sequences
- Replies: 5
- Views: 7228
permutation
A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter or a pair of distinct letters written in alphabetical order. What is the least number of letters that can be used if there are 12 participants, and each participant is to ...
- by albema
Wed Dec 10, 2008 2:39 pm- Forum: Problem Solving
- Topic: permutation
- Replies: 4
- Views: 1606