1

# What is the value of x? (1) X^3 is a 2-digit positive odd

Open 2 Answers 95 Views Data Sufficiency
GMAT Timer00:00
What is the value of x?
(1) X^3 is a 2-digit positive odd integer.
(2) X^4 is a 2-digit positive odd integer.

0
(1)X^3=+ve 2digit odd --> X =+ve odd { odd x odd x odd= odd}
---> 1, 3, 5, 7,9....
1^3=1, 3^3=27; 5^3=125.....hence X=3
(2) X^4=+ve 2 digit odd --> X =+odd or -ve odd
----> ..-5, -3,-1 or 1, 3, 5, 7,9....
1^4=1, 3^4=91; 5^4=625.....hence  X=  +3
(-1)^4=1; (-3)^4=91; (-5)^4=625..... hence X=-3
Ans is A
answered Jun 5 by Beginner (1 point)
0
If x^3 and x^4 both are integers, x cannot be irrational. The only possibility for x is 3. Hence C is the right choice.
answered Jun 14, 2016 by Beginner (21 points)
Student Speaks

Jyotsna Mehta

Indian School of Business, Co'18

I am very thankful to Gmatxchange and would definitely recommend Gmatxchange mentors to all those students applying for MBA admissions

Your Tentative GMAT Score
Estimate your GMAT score.
700
The scorer helps you to determine your current level within a few questions you solve.Read More
Please log in or register to use the Scoring Feature