• # question_answer In a seminar the number of participants in Mathematics, Physics and Biology are 192 240 and 168. Find the minimum number of rooms required if in each room same number of participants is to be seated and all of them being in the same subject.        A) 20                               B) 25                   C)         28                  D)         30

HCF of $(192,\,240,\,168)=2\times 2\times 2\times 3=24$ Number of rooms for participants in Mathematics, Physics and Biology respectively is $\frac{192}{24}=8,\,\frac{240}{24}=10$ and  $\frac{168}{24}=7$ $\therefore$ Total minimum number of required rooms = 25