Tuesday
March 28, 2017

Post a New Question

Posted by on .

the green light flashes every 3 seconds,the red every 5 seconds and white at 10 seconds. iF they flash at 12 noon.When will they flash together again in a minute? in an hour?

  • Math - ,

    Both, in a minute and in an hour.

    The LCM of 3, 5 and 10 is the same as the LCM of 3 and 10 because 5 divides 10 (5 is a factor of 10).
    The LCM of 3 and 10 is 30.
    So the soonest the will flash together is 30 seconds.

  • Awesome - ,

    The LCM of 3, 5 and 10 is the same as the LCM of 3 and 10 because 5 divides 10 (5 is a factor of 10).
    The LCM of 3 and 10 is 30.
    So the soonest the will flash together is 30 seconds.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question