A green glass door admits only certain objects. Apples and balls are allowed but pears and bats are not allowed. What determines whether an item can enter?
If an item has two consecutive identical letters it is allowed in.
Wherever the objects contain double alphabets, such things are admitted by green glass door. Where the name of the objects do not contain double alphabets, such things are not admitted.
In the valley of the Green Glass Door. There is a pool but no water, apples but no grapes, school but no learning, trees but no branches, teeth but no mouths, Halloween but no candy, and mirrors but no reflections.
Why is this?
Only certain people can go through the door. Lukaku, Jorginho, Arrizabalaga and Werner can go. Kante, Antonio, Christensen and Silva can't go. So can Chilwell go through the door?
You enter a dark room. You have only one match. There is an oil lamp, a furnace, and a stove in the room. Which would you light first?
You are in an empty room with a transparent glass of water. The glass is a right cylinder and appears to be half full. How can you accurately figure out whether the glass is half full, more than half full, or less than half full? You have no rulers or writing utensils.
This logic puzzle was published in Martin Gardner's column in the Scientific American. You are in a room with no metal objects except for two iron rods. Only one of them is a magnet. How can you identify which one is a magnet?