Which is heavier: a ton of bricks or a ton of feathers?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

My location can be determined by the below rebus.
So where am i ?

Who always enjoys poor health?

Can you find out the missing number in the grid?

There is a place where if I stand up straight, I will still be considered sideways.

Can you fill the blank with the correct number?

6 30 870 756030 _____

What has no start, end, or centre?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?