There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

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?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Why Aeroplane windows are round?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What does this rebus mean?

O
N
C
E
TIME