Question

A school has 120, 192 and 144 students enrolled for its science, arts and
commerce courses. All students have to be seated in rooms for an exam such
that each room has students of only the same course and also all rooms have
equal number of students. What is the least number of rooms needed?​

Answer 1

Answer:

as all the numbers are multiple of 12 therefore the number of students in each room should also be in multiple of 12 only.

either 12 ,24,36 etc

120/24=5

192/24=8

144/24=6

5+8+6=19 is least number of rooms needed