The 120 students in a group are to be seated in rows so that there is an equal number of students in each row. Each of the following could be the number of rows EXCEPT Pick one:
A) 4 B) 20 C) 30 D) 40 E) 90
Obviously the number of rows must be a factor of 120. The only option which is not a factor of 120 is E (90).   Answer: 90.
<result>E</result>
The 120 students in a group are to be seated in rows so that there is an equal number of students in each row. Each of the following could be the number of rows EXCEPT