I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

What has a ring but no finger?

What you cannot hold but it is yours?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What is the next number in this matchsticks series riddle?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?