The traffic lights at three different road crossings change after every 48 sec, 72 sec and 108 sec respectively. If they all change simultaneously at 8:20:00 hrs, when will they change again simultaneously

On Benz Circle three consecutive traffic lights change after 35,42,70 seconds respectively. If the lights are switched on at 2:00 P.M. sharp at what time will they change simultaneously?

Red, Green and Yellow light of a traffic signal blinks at an interval of 15 second, 20 second and 25 second. If they all blinks together at 9:00 AM then at what time they will again blink simultaneously.9:12 AM9:05 AM9:08 AM9:06 AM

Two of the lights at stadium are flickering. They both just flickered at the same time. One of the lights flickers every 7 seconds and the other flickers every 8 seconds. How many seconds until both lights will flicker at the same time again?

Every day a school bus driver passes the same traffic light twice, once before school and once after.Each time he passes the light, he records if it is red, green, or yellow.Here is a summary of the data he got after 200 days.Traffic light before school Traffic light after school Number of daysred red 33red green 23red yellow 28green red 17green green 34green yellow 13yellow red 21yellow green 15yellow yellow 16Suppose the driver will continue recording the colors for 150 more days.In how many of these 150 days will the light be green exactly once? Use the data to make a prediction.

There are 5 bells which toll together at 10:00 A.M. They toll after 8,9,10,11,12 seconds respectively. How many times will they toll together again in the next 4 hours?