Halloween Brain Teasers with Answers

Four vampires order a coffin-shaped pizza cut into eight equal slices. They share it evenly. How many slices does each vampire eat?

Three doors lead out of a haunted mansion. Ghost A says, “Door B is safe.” Ghost B says, “Door C is unsafe.” Ghost C says, “Ghost B is lying.” Only one ghost tells the truth. Which door is safe?

Three witches carve three pumpkins in three minutes. At that rate, how many witches are needed to carve 30 pumpkins in 30 minutes?

A coven meets every 6 nights; a warlock council meets every 8 nights. They meet together tonight. In how many nights will they meet together again?

Six skeletons gather for a boneyard mixer. Each greets every other skeleton with a bony handshake once. How many handshakes occur?

A cauldron holds chocolate eyeballs and gummy worms in a 3:2 ratio. If there are 60 pieces total, how many gummy worms are there?

You have a 5-cup and a 2-cup jug. How can you measure exactly 3 cups of swamp-brew potion for the recipe?

A haunted hotel has 20 floors, but the ghost elevator refuses any floor whose number contains a 4 or 9. How many floors can the elevator visit?

After midnight the hour and minute hands overlap for the first time. At what time does this happen?

Trick-or-treaters need 4 minutes per house (3 to walk, 1 to collect candy). How long to visit 12 houses in a row?

Three jack-o’-lanterns blink on cycles of 2, 3, and 5 minutes. If they blink together now, when will they blink together again?

During a full-moon stakeout you spot 24 glowing eyes in the bushes. Two campers are hiding there as well. How many wolves are watching you?

A jar of spectral spiders doubles its webbing every hour. If the jar is full at midnight, when was it half full?

A haunted corridor has room numbers whose digits add with their reverse to make 99. Which two-digit room should you choose to escape?

A candy cauldron starts with 10 candy corns and 7 chocolate bats. Each visitor takes two sweets: if the pieces match, they drop a chocolate bat back; if they differ, they drop a candy corn back. When only one candy remains, what is it?