Question

This question was asked in Ex 5.1, 1
Subhash Prasad Kashyap Kashyap's image
Subhash Prasad Kashyap Kashyap
Oct. 29, 2016, 8:53 p.m.
Six bells commence tolling together and toll at interval of 2,4,6,8,10&12 seconds respectively. In 30 minutes, how many times do they toll together?