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?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

Can you solve the maths in the below-given picture equation?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

What does does this rebus picture means ?

Can you solve the below algebraic mathematical equation?

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

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

In the image given, you can find several triangles. Can you count them all?