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?

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

People put me on the table and cut me but do not eat me. What am I?