SOLUTION: A yellow neon light blinks every 6 seconds, a pink neon light blinks every 5 seconds,and a red neon light blinks every 4 second. How many times within 30 minutes will they blink to

Question 1123968: A yellow neon light blinks every 6 seconds, a pink neon light blinks every 5 seconds,and a red neon light blinks every 4 second. How many times within 30 minutes will they blink together.?
Found 2 solutions by Alex.33, Alan3354:
Answer by Alex.33(110) (Show Source): You can put this solution on YOUR website!
In this case we're finding the common multiples of 6,5,and 4, within 30.
6=2*3
4=2*2
5=1*5.
a common multiple must contain each factor in all numbers at least once.
smallest common multiple: 2*2*3*5=60.
So unlucky...0 times.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A yellow neon light blinks every 6 seconds, a pink neon light blinks every 5 seconds,and a red neon light blinks every 4 second. How many times within 30 minutes will they blink together.?
---------
The LCM = 60 seconds --> coincident once per minute.
30 minutes --> 30 coincident blinks,
OR 31 if it's from zero to 30 inclusive.
RELATED QUESTIONS
a blue neon light blinks every 4 seconds. A red one blinks every 5 seconds, while a green (answered by ankor@dixie-net.com)
a blue neon light blinks every 4 seconds. a red one blinks every 5 seconds. while a green (answered by htmentor)
When Will The Lights blink. The Red light blinks every 4 seconds, the green lights blink... (answered by greenestamps,josgarithmetic)
Two neon lights are turned on at the same time. One blinks every 4 seconds and the other... (answered by Alan3354)
If a red light flashes every 12 seconds and a yellow light flashes every 30 seconds, what (answered by jim_thompson5910)
The green neon lights flash every 5 seconds, the blue every 6 seconds and the red every 7 (answered by Boreal)
one light flashes once every 6 seconds,a second light flashes every 5 second s and a... (answered by mananth)
Suppose a certain traffic light shows a red light for 42 seconds, a green light for 45... (answered by robertb)
Suppose a certain traffic light shows a red light for 41 seconds, a green light for 45... (answered by Boreal)