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?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Can you replace the question mark with the correct number?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

In the image given, you can find several triangles. Can you count them all?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

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