Aptitude Overflow

+1 vote

If x is a positive integer such that. $2x + 12$ is perfectly divisibly by $x$, then the number of possible values of $x$ is:

- $2$
- $5$
- $6$
- $12$

+2 votes

Best answer

If (2x + 12) is perfectly divisible by x, then (2x + 12)/x has to be an integer as x is an integer.

Now if we divide, the expression simplifies to (2 + 12/x). The only way in which this expression would be an integer is when 12/x is an integer or if 12 is perfectly divisible by x.

This is possible if x takes either of these values : 1, 2, 3, 4, 6, 12.

Hence the answer is 6 values.

**Option C is Correct Answer**

2,812 questions

1,192 answers

451 comments

40,115 users