SOLUTION: The red lights in an advertisement board blink every 3 seconds. The blue lights blink every 4 seconds and the green lights blink every 6 seconds. The three kinds of lights blinked
Algebra ->
Divisibility and Prime Numbers
-> SOLUTION: The red lights in an advertisement board blink every 3 seconds. The blue lights blink every 4 seconds and the green lights blink every 6 seconds. The three kinds of lights blinked
Log On
Question 242981: The red lights in an advertisement board blink every 3 seconds. The blue lights blink every 4 seconds and the green lights blink every 6 seconds. The three kinds of lights blinked together at 7:00 p.m. After how many seconds will they blinked together again? How many times will they blink together in one minute? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The red lights in an advertisement board blink every 3 seconds. The blue lights blink every 4 seconds and the green lights blink every 6 seconds. The three kinds of lights blinked together at 7:00 p.m. After how many seconds will they blink together again? How many times will they blink together in one minute?
-----------------
Find the least common multiple of 3, 4, and 6.
LCM is 12.
Ans: 12 seconds after 7:00
----------
Ans: In one minutute they will blink together 60/12 = 5 times.
===========================
Cheers,
Stan H.
(