A square sheet of paper is folded in half top-to-bottom, then folded in half left-to-right. A single hole is punched straight through the middle of the small folded square. When completely unfolded, how many holes are in the sheet?
4 holes
Folding twice creates 4 layers of paper. Punching through the middle of the folded square pierces all 4 layers at points that spread out into 4 distinct quadrants when unfolded.
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: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
More logic riddles
What has hands but cannot clap, a face but cannot smile, and moves forward constantly without legs?
Three boxes are labeled: 'Apples', 'Oranges', and 'Apples and Oranges'. Every single box is labeled incorrectly. You are allowed to draw only one fruit from one box to fix all the labels. Which box do you choose to draw from?
Two fathers and two sons went fishing. Each caught exactly one fish, yet they brought home only three fish total. How is this mathematically and logically possible?
I have no voice, yet I speak all languages. I have no legs, yet I travel across every ocean. I am born of earth, shaped by human hands, and read without letters. What am I?
I am a house where nobody lives, yet people say ghosts stay in me. What am I?
Three travelers need to cross a river using a boat that can hold a maximum weight of 100 kg. Traveler X weighs 100 kg, Traveler Y weighs 50 kg, and Traveler Z weighs 50 kg. How can all three cross to the other side?