What is black when you buy it, red when you use it, and gray when you throw it away?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

What came first, the chicken or the egg?

What occurs twice in a week, once in a year but never in a day?

Solve this riddle by finding the odd one out from the rest.

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

Replace the question mark in the picture below.

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?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?