Question

Three persons can complete a work in 6 days, 8 days and 12 days respectively. If all the three persons work together the number of days required to complete the same work?

Answer 1

1/6 + 1/8 +1/12
4/24+3/24+2/24
9/24 or 3/8
2.66 days

Answer 2

it will be their LCM that is
6=2*3
8=2*2*2
12=2*2*3
=2*3*2*2
=24