HELP PLEASEEE. I DONT UNDERSTAND

Hurry and answer this! circle x with a radius of 6 units and circle y with a radius of 2 units are shown which steps would prove the circles similar? translate the circles so they share a common center point, and dilate circle y by a scale factor of 4. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 4. translate the circles so they share a common center point, and dilate circle y by a scale factor of 3. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 3

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5