Asked by Hailey

I am having trouble, I have a question I think I got the answer because I kept multiplying and dividing, but I have to show my work but when i try, my answer is not the same.

The question is A traffic light at one intersection changes every 28 seconds and the light at the other intersection changes every 32 seconds. How long until they both change together?

I got every 8 light changes. Can you please help me solve this?
Answered by Hailey
sorry forgot to put math.
Answered by Hailey
I got it, it is every 224 seconds. I had to find the LCM to find the GCF. I then had to multiply 28 and 32 to divide the GCF which gave me 224. Thanks anyway.
Answered by Jen
Definitely not 2nd grade..
Answered by bill
it is 1,235,1469,2587,265,874 times 1million
Answered by kally
don't listen to bill.







he is in high school.