Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

Can you find the 09 errors in the picture below?

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?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What two things can you never eat for breakfast?

What is both possible and impossible at the same time?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?