Find the value of "?" in the ball picture Riddle below:

Teacher ask the student

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

what did student replied ?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

What can go up a chimney down, but can’t go down a chimney up?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

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

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT