135 participantsare in english and165 are in mathematics. find the minimum number oof room required to seat them if each room must have the same number of participants from each two subject?

Minimum number of room would be 1 in this case as then, you can have all 135 english participants and the same number of maths participants seated in that room. However, in this case, you will be left with 30 additional Maths participants which need to seated separately. 

 

Since, the number of participants in 2 subjects are different, so it would not be possible to make them all sit in a way that there are equal number of participants from 2 subjects in each and every room.