7 of them.
You could, but they will taste sour and may make you sick.
No, if the oranges are old enough they will be spoiled and could make you sick.
Eating oranges will only make you slim temperarly.
Foods "spoil" and begin to have a bad odor so humans (or animals) know to not eat them. Oranges that have started to become rotten will not taste good. They could make you nauseated. But, slightly rotten oranges are not poisonous to humans.
Oranges don' t make sounds.
No, but they are good for you.
The oranges are growing. Make sure they have plenty of water and fertilizer over the summer so that you will have nice, juicy oranges.
It takes about 20 pounds of oranges to make a half bushel.
Oranges can make you pool a lot. Sometimes you may feel like you have diarrhea but it might not be so much.
You can make fresh squeezed orange juice or orange marmalade jelly from oranges.
I don't see how two oranges could eat a hippo. Is this part of a game?