gmatophobia
DS Question 1 - July 28 How many different prime numbers are factors of the positive integer n ? (1) 2n has one prime factor. (2) 3n has one prime factor. Source:
GMAT Club Test | Difficulty: Hard
gmatophobia
PS Question 1 - July 28 Which of the following inequalities is equivalent to |2x-|x||< 3 ? A. 0 < x < 2 B. 0 < x < 3 C. -1 < x < 3 D. 0 < x < 1 E. -3 < x < 1 Source: Math Revolution | Difficulty: Hard
DS Question 1 - July 31The integers n and t are positive and n > t > 1. How many different subgroups of t items can be formed from a group of n different items?
(1) The number of different subgroups of n − t different items that can be formed from a group of n different items is 680.
(2) nt = 51
Source: Kaplan | Difficulty: Hard
PS Question 1 - July 31At 3.20 pm, Daniel’s watch developed a mechanical fault and started moving in the reverse direction at twice the rate. At what next earliest time did it show the correct time for an instance?
A. 3.20 am
B. 5.50 am
C. 5.50 pm
D. 7.20 pm
E. 11.20 pm
Source: Expert’s Global | Difficulty: Hard