Chuck planted an unusual orange tree one afternoon. It came with 4 oranges on it and the number of oranges on the tree doubles each morning. Chuck, upon returning home for lunch each day, picks and eats 3 oranges for his lunch.

Fred has an unusual grapefruit tree. Each morning four more grapefruits grow on the tree. His family picks and eats 6 grapefruits at lunchtime.

How many grapefruits were on Fred's tree in the morning on the day Chuck planted his tree, if on the tenth day (in the morning ) the number or oranges and grapefruits, on both trees, were exactly the same?