The ruler is bigger than the book, and the eraser is bigger than the ruler. Which one is the middle size?
The ruler.
From biggest: eraser, ruler, book.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
More logic riddles
Five friends line up for a ride at the fair, and the sign lists only these facts. Hugo stands ahead of Boris. Carmen stands ahead of Kira. Kira stands ahead of Hugo. Boris stands ahead of Mara. Who stands last in line?
I have no legs, but I beat all day, and I live inside your chest. What am I?
A row goes: turkey, turkey, pie, turkey, turkey, pie, turkey, turkey. What comes next?
A line goes: flag, firework, flag, firework, flag. What comes next?
I fall from the sky, each of me is different, and I turn the ground white. What am I?
I am a pink or red piece of candy shaped like a heart. What am I?