A maths symbol is hidden in the below Bar Graph. Can you decipher it?

I have teeth but i don't bite. Who Am I ?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

500 women soldiers are arranged in an array of ten rows and fifty columns in accordance with their respective heights. Now, the tallest woman from each row is asked to move out in the front. From them, the shortest one is labelled as Alpha. They are then asked to resume their original position.

Now, the shortest woman in each column is asked to come out in front. The tallest among them is labelled as Beta.

Can you find out if Alpha will be taller or Beta?

Can you move 2 matchsticks to form four equal sized squares.

What can you hold in your right hand, but never in your left hand?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

What does this below rebus puzzle mean?

I cannot talk, but I always reply when spoken to. What am I?