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 does this rebus riddle means ?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

How many words can a pen with half refill write?

Can you make a six-letter word using the letters N, A and B ?

People put me on the table and cut me but do not eat me. What am I?

What is full of holes but still holds water?

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?

What goes up but never comes down?