Question

Q3) He decorated the path in his garden with LED bulbs in three rows So 1 point
that the bulbs in the first row blink at every 4 min, the bulbs in the
second row blink at every 6 min and the bulbs in the third row blink at
every 8 min. When will they blink together for the first time if he
switches the lights on together at 6pm?*
O 6.24 pm
6.30 pm
6.40 pm
They will not blink together at any time

Answer 1

Answer:

Find LCM of 4,6,8=24

so after 6pm they will keep blinking together in every 24 minutes.

thus if switched on at 6pm then they will blink together first time at 6.24pm