Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

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?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

What English word has three consecutive double letters?

What number divided by 4 is the same as that number minus 4?