Monday

January 26, 2015

January 26, 2015

Posted by **Anonymous** on Thursday, April 7, 2011 at 12:13am.

- math -
**MathMate**, Thursday, April 7, 2011 at 10:51amIf you have not learned about LCM before, then you can make a list:

9:00 11 13 15 17 19**21**23:00

9:00 12 15 18**21**0:00

9:00 13 17**21**01:00

21:00 = 9:00 pm is the next time all three bells will ring together.

If you are familiar with LCM, then the intervals are 2,3 and 4 hours.

The LCM of 2, 3 is 6 hours,

the LCM of 3,4 is 12,

the LCM of 2,4 is 4.

So take the longest period of 12 hours and add to 9:00am to get 9:00pm.

**Answer this Question**

**Related Questions**

math - A bell rings every 2 hours, a second bell rings every 3 hours, and a ...

math - a bell rings er=very 2hours,a srcond bell rings every 3 hours,and a third...

Math-geometry - Determine if the argument is valid or invalid. Give a reason to ...

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

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

physics - At a carnival, you can try to ring a bell by striking a target with a...

math - The bell rings for school at 8:30 a.m. Elia must be there 15 minute ...

Physics - Two 10 cm diameter charged rings face each other, 20 cm apart. The ...

Nautical Studies - IRPCS - Vessel over 100m aground in fog - sound signals. ...

Science - it is now 8:59am but when the bell rings at 9:00am Suzete will be late...