If you say my name, I will no longer exist. What am I?

Find the hidden panda in the image below.

Move four matchsticks to the below square to form three squares?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

What seven-letter word has hundreds of letters in it?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?