Question
Quantitative Aptitude Question on Number Systems
If n is a natural number less than or equal to 5, for how many values of n is 3n- n a prime number?
A
0
B
1
C
2
D
3
E
4
Answer
3
Explanation
Solution
The correct answer is option (D): 3
If n is a natural number less than or equal to 5, for how many values of n is 3n- n a prime number?
0
1
2
3
4
3
The correct answer is option (D): 3