What happened when the wheel was invented?

Teacher ask the student

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

what did student replied ?

What does the below rebus riddle means?

Find the missing number in the sequence below:

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

What number do you get when you multiply all of the numbers on a telephone's number pad?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?