Sunday

March 1, 2015

March 1, 2015

Posted by **DJAZIA** on Friday, February 20, 2009 at 4:06pm.

- NUKMERACY -
**drwls**, Friday, February 20, 2009 at 5:37pmThe period between the beginning of a "shine" is 6 seconds for #1, 8 seconds for #2 and 10 seconds for #3. the lowest common multiple of those numbers is 2*3*2*2*5 = 120 seconds. That is when they will come ON together for the next time.

When they come OFF together is more complicated. #1 goes off at t = 3, 9, 15, 21, 27, etc s. #2 goes off at 4, 12, 20, 28, 36.. s. One set of number is odd and the other even. The "off" times can never coincide.

Maybe another teacher will prove me wrong about this

**Answer this Question**

**Related Questions**

7th grade math - Each of the first 4 pit stops a racecar driver makes loses ten ...

Pre-Calc - A ferris wheel is 63 feet tall when it reaches its highest point at 8...

Physics - If the vertical component of velocity for a projectile is 7.3 meters/...

Physics - If the vertical component of velocity for a projectile is 7.3 meters/...

Math - 4 members of a relay team each ran one lap of a race. THeir times were 58...

math - a red light winks every 6 seconds, a white one every 10 seconds, and a ...

Calculus (Derivatives) - Two particles are moving in straight lines. The ...

English - 1. Cut out all the pieces. (Does 'out' mean 'completely' here?) 2. ...

mathematics - A bell rings every 2 seconds, and a bird chirps every 3 seconds. ...

Math - A bell rings every 2 seconds, and a bird chirps every 3 seconds. If the ...