Search found 76 matches
value of r
If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24, what is the value of r?
1) n is not divisible by 2.
2) n is not divisible by 3.
- by daretodream
Fri Feb 19, 2010 3:47 am- Forum: Data Sufficiency
- Topic: value of r
- Replies: 2
- Views: 1000
- by daretodream
Fri Feb 19, 2010 3:41 am- Forum: Data Sufficiency
- Topic: |x| <1 ?
- Replies: 3
- Views: 1113
- by daretodream
Fri Feb 19, 2010 3:39 am- Forum: Data Sufficiency
- Topic: integers
- Replies: 11
- Views: 2086
perfect square
Is the positive integer N a perfect square?
(1) The number of distinct factors of N is even.
(2) The sum of all distinct factors of N is even
- by daretodream
Fri Feb 19, 2010 3:38 am- Forum: Data Sufficiency
- Topic: perfect square
- Replies: 5
- Views: 1842
- by daretodream
Fri Feb 19, 2010 3:37 am- Forum: Data Sufficiency
- Topic: prep problem
- Replies: 6
- Views: 1327
marbles
John must select a marble from a bag containing red,green and blue marbles.If there are 20 marbles or fewer in the bag,is the probability that he will select a red marble greater than 1/4? 1.there are twice asmany blue marbles as green marbles 2.There is a 3/5 probability that the marble chosen will...
- by daretodream
Fri Feb 19, 2010 3:37 am- Forum: Data Sufficiency
- Topic: marbles
- Replies: 3
- Views: 1215
is n/15 an integer?
If n is an integer, is n/15 an integer?
(1) 3n/15 is an integer.
(2) 8n/15 is an integer.
- by daretodream
Fri Feb 19, 2010 3:36 am- Forum: Data Sufficiency
- Topic: is n/15 an integer?
- Replies: 3
- Views: 4436
- by daretodream
Fri Feb 19, 2010 3:35 am- Forum: Data Sufficiency
- Topic: x,n
- Replies: 3
- Views: 845
- by daretodream
Fri Feb 19, 2010 3:35 am- Forum: Data Sufficiency
- Topic: is p>q ?
- Replies: 3
- Views: 1061
family seating arrangements
A family consisting of one mother, one father, two daughters and a son is taking a road trip in a sedan. The sedan has two front seats and three back seats. If one of the parents must drive and the two daughters refuse to sit next to each other, how many possible seating arrangements are there? 28 3...
- by daretodream
Fri Feb 19, 2010 3:32 am- Forum: Problem Solving
- Topic: family seating arrangements
- Replies: 2
- Views: 1060
integers
If n and y are positive integers, and 450y=n^3 , which of the following is an integer?
I. y / ( 3 * 2^2 * 5 )
II. y / ( 3^2 * 2 * 5 )
III. y / ( 3 * 2 * 5^2 )
A) None
B) I only
C) II only
D) III only
E) I,II, and III
- by daretodream
Fri Feb 19, 2010 3:32 am- Forum: Problem Solving
- Topic: integers
- Replies: 5
- Views: 1128
set
Set R contains five numbers that have an average value of 55. If the median of the set is equal to the mean, and the largest number in the set is equal to 20 more than three times the smallest number, what is the largest possible range for the numbers in the set? a) 78 b) 77 1/5 c) 66 1/7 d) 55 1/7 ...
- by daretodream
Fri Feb 19, 2010 3:31 am- Forum: Problem Solving
- Topic: set
- Replies: 6
- Views: 2271
- by daretodream
Fri Feb 19, 2010 3:31 am- Forum: Problem Solving
- Topic: please show work. TIA
- Replies: 4
- Views: 1045
- by daretodream
Fri Feb 19, 2010 3:30 am- Forum: Problem Solving
- Topic: please show the steps
- Replies: 4
- Views: 957
simple probability question
TWO couples and a single person are to be seated on 5 chairs such that no
couple is seated next to each other. What is the probability of the above??
- by daretodream
Fri Feb 19, 2010 3:30 am- Forum: Problem Solving
- Topic: simple probability question
- Replies: 4
- Views: 1159