Which pair(s) of numbers has (have) a greatest common factor of 9? Select ALL that apply.
89 and 18
49 and 27
45 and 63
36 and 54
18 and 63

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.