Respuesta :
Find the lowest common multiple of 3 and 5, that is 15
the lights will blink together every 15 seconds
in 1 minute blink together [tex]\frac{60}{15}[/tex] = 4 times
that is at 15, 30, 45 and 60
Answer:
They will blink 4 times together in one minute.
Step-by-step explanation:
The amount it takes for them to blink together is the least common multiple between the time it takes for each of them to blink together.
The red light blinks each 3 seconds.
The blue light blinks each 5 seconds.
The least common multiple between 3 and 5 is 15. So they will blink together each 15 seconds.
Each minute has 60 seconds. So they will blink 60/15 = 4 times together in one minute.
