Can anyone give me a simple answer to understand what root squared is and a way i can easily do it if ur stupid at maths

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

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.