Question

180 students in a group are to be seated in rows so that there are an equal number of
students in each row. Each of the following could be the number of rows EXCEPT....
pls explain This.. i can't understand it.

(4) 4
(B) 20
(C) 30
(D) 40
(E) 90
​

Answer 1

Step-by-step explanation:

Obviously the number of rows must be a factor of 180. The only option which is not a factor of 180 .

Answer: D