I look at you, you look at me I raise my right, you raise your left. What am I?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

What Does this text mean:

important=important

A man was just doing his job when his suit was torn. Why did he die three minutes later?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?