I got this problem wrong while studying, I don't understand why? Could someone help me?

A matrix contains 60 elements. Which of the following cannot equal the number of rows of the matrix?
a. 30
b. 60
c. 10
d. 18

Question

I got this problem wrong while studying, I don't understand why? Could someone help me?

A matrix contains 60 elements. Which of the following cannot equal the number of rows of the matrix?
a. 30
b. 60
c. 10
d. 18

anonymous · Answer

I wasn't sure so I put 60 but it told me the answer was 18

anonymous · Answer

A matrix will contain 60 elements if it has:

1 row and 60 columns
2 rows and 30 columns
3 rows and 20 columns
...
60 rows and 1 column

See a pattern here?

anonymous · Answer

My point is the the number of elements is the product of the number or rows and columns.

In other words, this is a factoring problem. Which of the answer choices is not a factor of 60?

anonymous · Answer

ahh I got it, thanks just that part wasn't explained to me so was a bit thrown off by the question