GRE Exam Numerical Ability Number System

If x is a positive integer such that (x-1)(x-3)(x-5)....(x-93) < 0, how many values can x take?
A. 47 B. 23 C. 46 D. 21E. 22

Read Solution (Total 1)

Since the last digit is 93,
2* (47) = 94,,
Therefore x can take 47 values (Option A).
6 years agoHelpfull: Yes(0) No(0)

GRE Other Question

If x is a positive integer with fewer than 3 digits, what is the probability that x*(x + 1) is a multiple of either 4 or 5?
[A] 4/99 [B] 2/25 [C] 8/99 [D] 86/99 Working alone at their respective constant rates, A can complete a task in ‘a’ days and B in ‘b’ days. They take turns in doing the task with each working 2 days at a time. If A starts they finish the task in exactly 10 days. If B starts, they take half a day more. How long does it take to complete the task if they both work together?
A. 46/9 B. 50/9 C. 50/11 D. 36/7 E. 210/41