Races and Games - General Questions

A runs 1 1/9 times as fast as B. If A gives B a start of x metres so that the race of 300 m ends in a dead heat, what is x?

In a game of 50 points, A can give B 15 points and B can give C 20 points. How many points can A give C?

A runs 1 2/3 times as fast as B. If A gives B a start of x metres so that the race of 500 m ends in a dead heat, what is x?

A runs 1 1/7 times as fast as B. If A gives B a start of x metres so that the race of 200 m ends in a dead heat, what is x?

A runs 1 1/7 times as fast as B. If A gives B a start of x metres so that the race of 500 m ends in a dead heat, what is x?