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?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

What's a single-digit number with no value?

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

81 x 9 = 801. What must you do to make the this equation true?

What has 13 hearts but no other organs?

What has one eye, but can’t see?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

I know a nine-letter word having only one vowel.
Do you ?

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