What number when divided in half becomes zero?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What building has the most stories?

Why is the Hole below a Lock?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What country can make you shiver?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?