Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

How many times can you subtract the number two from the number fifty?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

I shave every day, but my beard stays the same. What am I?

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?

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

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Which number should replace the question mark?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?