Question

a red string of holiday lights blinks once every 3 seconds while a string of blue lgihts blink once every 4 seconds. how many times with both sets of lights blink at the same time in 1 minute

Answer 1

the highest common factor of 4 and 3 is 12
one minute has 60 secs
thus it will blink 60/12=5 times

Answer 2

Answer:

the HCF OF 4 and 3 is 12

1 MIN IS 60 secs

thus it will blink 60/12=5 times

Step-by-step explanation: