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
I am a house where nobody lives, yet people say ghosts stay in me. What am I?
I am a small paper note you pass to a friend that says "I like you." What am I?
Five friends line up for a ride at the fair, and the sign lists only these facts. Kira stands ahead of Boris. Carmen stands ahead of Elena. Elena stands ahead of Kira. Boris stands ahead of Aria. Who stands third in line?
A row goes: rabbit, rabbit, chick, rabbit, rabbit, chick, rabbit, rabbit. What comes next?
A row goes: firework, firework, sparkler, firework, firework, sparkler, firework, firework. What comes next?
I lead Santa's sleigh with a glowing red nose. Who am I?

