6th grade
posted by Zack .
I need to come up with some math questions about the solar system.

assistance needed
School subject is not "6th grade." 
i need help on this math question. when is the greatest common factor of the two numbers one of the two numbers? Will you help me on this?

please respond to this question. when is the greatest common factor of the two numbers one of the two numbers? i really need help on this becuase i don't get it. thank you!

Compare the mass of the Sun to that of Earth.
What is a light year? How long does it take Sunlight to reach Earth? To reach Pluto?