What is common among 11, 69, and 88?

Can you solve the below rebus?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

How many Watermelons are there in the below picture?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Solve the alphametic puzzle by replacing the alphabet with the number.

S T O R M +
S O L E S
=========
T O W E L
=========

What is the next number in this series?

4,12,84,3612....