The traffic lights at three different road junctions change after every 40 seconds, 60 seconds and 72 seconds respectively. If they changed simultaneously together at 8 am at the junctions,at what time will they simultaneously change together again?

The traffic lights at three different road junctions change after every 40 seconds, 60 seconds and 72 seconds respectively. If they changed simultaneously together at 8 am at the junctions,at what time will they simultaneously change together again?

Matching exercise

Match the items on the right to the items on the left.

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