Search found 44 matches
Tough DS question
Is the square root of the positive integer X an integer?
(1) The sum of the distinct factors of X is odd.
(2) X has an odd number of distinct factors.
- by rishianand7
Mon Aug 19, 2013 11:11 am- Forum: Data Sufficiency
- Topic: Tough DS question
- Replies: 5
- Views: 1527
Tough PS question
List L: ABC, BCA, CAB
In list L above, there are 3 positive integers, where each of A, B, and C is a different nonzero digit. Which of the following is the sum of all the positive integers that MUST be factors of the sum of the integers in list L?
47
114
152
161
188
- by rishianand7
Mon Aug 19, 2013 11:09 am- Forum: Problem Solving
- Topic: Tough PS question
- Replies: 4
- Views: 1866
good question
A dog breeder currently has 9 breeding dogs. 6 of the dogs have exactly 1 littermate, and 3 of the dogs have exactly 2 littermates. If 2 dogs are selected at random, what is the probability that both selected dogs are NOT littermates?
1/6
2/9
5/6
7/9
8/9
- by rishianand7
Mon Aug 19, 2013 9:20 am- Forum: Problem Solving
- Topic: good question
- Replies: 2
- Views: 1121
Tough Word Problem
In a village of hundred households, 75 have atleast one DVD player, 80 have atleast one cellphone and 55 have atleast one mp3 player. Every village has atleast one of these 3 devices. If X and Y are respectively the greatest and lowest possible number of households that have all 3 devices then X-Y i...
- by rishianand7
Fri Aug 16, 2013 4:05 am- Forum: Problem Solving
- Topic: Tough Word Problem
- Replies: 5
- Views: 2344
Not able to solve this..good question
A certain city with a population of 132000 is divided into 11 districts, and no district is to have a population that is more than 10% of the population of any other district. What is the minimum possible population that the least populated district could have?
A)10700
B)10800
C)10900
D)11000
E)11100
- by rishianand7
Thu Aug 15, 2013 10:27 am- Forum: Problem Solving
- Topic: Not able to solve this..good question
- Replies: 2
- Views: 1026
Conceptual DS question
A set consists of n consecutive integers in which the smallest term is 1. What is the value of n? (1) When one of the numbers is removed from the set, the average of the remaining numbers in the set is 15. (2) When one of the numbers is removed from the set, the average of the remaining numbers in t...
- by rishianand7
Tue Aug 13, 2013 1:22 pm- Forum: Data Sufficiency
- Topic: Conceptual DS question
- Replies: 7
- Views: 2761
Nice question...
On a partly cloudy day, Derek decides to walk back from work. When it is sunny, he walks at a speed of s miles/hr (s is an integer) and when it gets cloudy, he increases his speed to (s + 1) miles/hr. If his average speed for the entire distance is 2.8 miles/hr, what fraction of the total distance d...
- by rishianand7
Tue Aug 13, 2013 1:21 pm- Forum: Problem Solving
- Topic: Nice question...
- Replies: 11
- Views: 4821
Tough PS question
On Main Street, a number of popular franchise restaurants are located at specific intervals. The Maghreb Sands coffee company maintains one store every 7/3 blocks, starting with the first store at the intersection of Main Street and Boardwalk. Two other restaurants at the intersection of Main and Br...
- by rishianand7
Tue Aug 13, 2013 1:20 pm- Forum: Problem Solving
- Topic: Tough PS question
- Replies: 4
- Views: 1648
Confusing DS question
Allison always leaves her office at 5.00pm and reaches her hotel in an hour, while Brittany leaves the same hotel sometime after 5, meets Allison and reaches the same office at 6.00pm. On Wednesday,just when Brittany met Allison, she realized she had left her laptop. So she went back to the hotel, p...
- by rishianand7
Tue Aug 13, 2013 1:19 pm- Forum: Data Sufficiency
- Topic: Confusing DS question
- Replies: 3
- Views: 1546
Inequalities question
If x,y,z are integers, xy + z is and odd integer, is x an even integer?
1) xy + xz is even
2) y + xz is odd
- by rishianand7
Wed Aug 07, 2013 8:03 am- Forum: Data Sufficiency
- Topic: Inequalities question
- Replies: 1
- Views: 1033
Hey Brent,
The OA is A.
The question states that "the units digit of the three-digit positive integer k is nonzero". Hence 'k' cannot be 30.
Thanks for the solution, I was able to deduce the answer using your explanation.
Regards,
Rishi
- by rishianand7
Tue Aug 06, 2013 7:22 am- Forum: Data Sufficiency
- Topic: Good Numbers/Digits Question
- Replies: 3
- Views: 1182
Good Numbers/Digits Question
If the units digit of the three-digit positive integer k is nonzero, what is the tens digit of k?
(1) The tens digit of k + 9 is 3.
(2) The tens digit of k + 4 is 2.
- by rishianand7
Tue Aug 06, 2013 4:34 am- Forum: Data Sufficiency
- Topic: Good Numbers/Digits Question
- Replies: 3
- Views: 1182
Official question..good one
If x, y, and k are positive numbers such that 10x/(x+y) + 20y/(x+y) = k and if x < y, which of the following could be the value of k?
A. 10
B. 12
C. 15
D. 18
E. 30
- by rishianand7
Tue Aug 06, 2013 4:33 am- Forum: Problem Solving
- Topic: Official question..good one
- Replies: 1
- Views: 1058
- by rishianand7
Tue Aug 06, 2013 4:31 am- Forum: Data Sufficiency
- Topic: Official question..good one
- Replies: 2
- Views: 887
Exponents question..need simple solution
If vmt ≠0, is (v^2)(m^3)(t^-4) > 0?
(1) m > v^2
(2) m > t^-4
- by rishianand7
Tue Aug 06, 2013 4:25 am- Forum: Data Sufficiency
- Topic: Exponents question..need simple solution
- Replies: 3
- Views: 1104