Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

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

What do you get if you add 2 to 100 four times?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?