Brain Teasers
You may flip two switches once. How can you identify all three bulbs?
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Three switches are outside. Which one powers the warm bulb inside?
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Four switches are outside. One controls a sealed room’s fan. Enter only once—how do you identify it?
Three jars are mislabeled. Pick one fruit to label every jar correctly. Which jar do you choose?
A person enters a room and presses a button. Moments later, everyone applauds. Why?
A bus driver goes the wrong way on a one-way street. Why isn’t he stopped?
A clock strikes six in 5 seconds. How long to strike twelve?
A man lives on the 20th floor. Why does he walk down but ride up?
Five people sit in a row. Two always lie. Who sits in the middle?
Three switches control one bulb upstairs. One trip upstairs only—how do you identify each switch?
I hug your papers without tape or glue. I bend my two arms back to let go. What am I?
I have many layers, but I’m not a book. Cut me and I may make you cry. What am I?
What Italian dish am I?
Why did the comma break up with the sentence?
I carry your weight all day, yet I never take a step. I rest beneath you, but when I am worn through, you notice me everywhere. What am I?
I borrow a shape from every room, yet I own no shape at all. I grow when the lights go low, but vanish when they go out. What am I?
What appears once in a minute, twice in a moment, but never in a thousand years?
A cupcake has disappeared! Exactly one of these three suspects took it, and exactly one statement is true. Ava says, “Ben took it.” Ben says, “I didn’t take it.” Cleo says, “Ava didn’t take it.” Who stole the cupcake?
I ride in a pocket, yet I never walk. I open a door without using a hand. What am I?
I travel from room to room without feet, carry no luggage, and leave nothing behind. You open me to let me in, then close me to keep me out. What am I?
I travel with your keys but open no lock. I hold your name, yet I cannot speak. I circle your finger only when I am not on your keys. What am I?
