What number when divided in half becomes zero?

What is the probability of getting five Mondays in a 31-day month?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Where do fish keep their money?

A woman who works in a sweet shop has a measurement of 32-26-36, is 5"4" tall, and wears size "6" shoes. What do you think she weighs?

What question can you never answer yes to?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Move three sticks of the spiral below to form a square.

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?