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?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?