A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Using Only Five 5's and any mathematical operator make sum as 37

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

What occurs twice in a week, once in a year but never in a day?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?