Posted by **Aisha** on Tuesday, December 11, 2012 at 10:42pm.

A blue light every 30seconds. A red light blinks every 40seconds. If both lights blink at exactly 1:00pm, at what time will they blink at the same time again?

- math -
**Ms. Sue**, Tuesday, December 11, 2012 at 10:53pm
The least common multiple of 30 and 40 is 120.

30, 60, 90, 120

30, 80, 120

1:00 + 120 seconds = ?

## Answer This Question

## Related Questions

- 6 grade math - a manager turns on the restaurants two neon signs at the same ...
- math - The manager turns the restaurants two neon signs on at the same time both...
- Math - The Restaurant's two neon signs are turned on at the same time. Both ...
- MATH 6 GRADE - The manager turns on the restaurant's two neon signs at the same ...
- Math - 2 neon lights are turned on at the same time. One blinks every 4 seconds ...
- math - on a radio tower, a red light flashes every 6 seconds and a blue light ...
- Math - I am very confused on how to figure out the below math problem: A traffic...
- math - 3 lights started at the same time..1st blinks at 5 seconds, 2nd at 6 ...
- math - Marley drives to work every day and passes two independently operated ...
- math - if one sign binks every 7 seconds and the other sign blinks every 9 ...

More Related Questions