What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

Take one out and scratch my head, I am now black but once was red. What am I?

Replace the question mark with the correct number.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

I always drive my customer away.

Who am I?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?