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?

What is black when you buy it, red when you use it, and gray when you throw it away?

Which word does the below Plexor means ?

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

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

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?

Can you count the number of matches in the picture below ?

How many times do a clock's hands overlap in a day ?