I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What is full of holes but still holds water?

If eleven plus two equals one, what does nine plus five equal?

Katniss and Peeta are liars. They both lie on some specific days.

Katniss lies on Fridays, Saturdays and Sundays. She speaks the truth on all other days.

Peeta lies on Tuesdays, Wednesdays and Thursdays. He speaks the truth on all other days.

Can you tell that one day of the week when both of them will say "Tomorrow, I will lie."?

There is a place where if I stand up straight, I will still be considered sideways.

Can you find out the missing number in the grid?

When it is alive we sing, when it is dead we clap our hands. What is it?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

When is the top of a mountain similar to a savings account?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?