13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

You bought me for dinner but never eat me. What am I?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

There are forty elephants and they have forty-fore heads. How can this be possible?

Which is heavier: a ton of bricks or a ton of feathers?

Can you move 2 matchsticks to form four equal sized squares.

What can you see in the middle of March and April that you can never see in any other month?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?