if bell rang at a difference of 6,8,12,18,45 sec. respectively.if they start ranging together at 8'o clock morning.then at what time they rang together?  Options
A) 3 minute	B) 6 minute	C) 15/2 minute	D) 1 min. 19 sec.	E) none of the above
l.c.m {6,8,12,18,45}   =360 sec=6 min   answer 6 minute
<result>B</result>
if bell rang at a difference of 6,8,12,18,45 sec. respectively.if they start ranging together at 8'o clock morning.then at what time they rang together?