Iam a4 digit even# between 4,000& 5,000. the sum of my digits is 16. the ones digit and hundreds digit are the same the tens digit and thousands digit are the same what number am i?

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.