Puzzle catalog
Puzzle Catalog - Page 16 of 16
Browse every riddle, brain teaser, and logic lab entry in one place with quick hints in each card.
Lily Pad Pond
Brain teasers · Exponential growth catches you by surprise.
Hint: Work backward from day 48.
Vampire's Reflection
Riddle lounge · Mirror, mirror, showing nothing.
Hint: Think of classic monsters that fear sunlight and mirrors.
Witch's Brew
Brain teasers · Three ingredients, specific proportions.
Hint: Pour between containers and keep track of what remains.
Haunted House Rooms
Logic lab · Which room is safe to enter?
Hint: Think about the vampire's condition after 100 years.
Counting Ghosts
Brain teasers · How many spirits haunt the mansion?
Hint: Set up equations: G ghosts scared 21 people, (G-3) ghosts scared 12 people.
Trick-or-Treat Logic
Logic lab · Fair candy distribution among costumes.
Hint: Let the witch have W candies. Express others in terms of W.
Santa's Route
Brain teasers · Visiting houses in optimal order.
Hint: This is a traveling salesman problem. Calculate different routes.
Gift Wrapper's Dilemma
Riddle lounge · I have no hands yet I cover gifts.
Hint: Think of what makes gifts look festive.
Reindeer Order
Logic lab · Determine the lineup from clues.
Hint: Start with the constraint that Vixen is between Prancer and Dancer.
Ornament Pattern
Brain teasers · Find the missing ornament count.
Hint: Look at the differences between consecutive rows: 2, 3, 4...
Cookie Exchange
Logic lab · Fair sharing with constraints.
Hint: Each family gives their cookies to the three families that will eat them.
Light Speed Travel
Brain teasers · How long to reach the sun?
Hint: Divide distance by speed, then convert seconds to minutes.
Element Mystery
Riddle lounge · I'm number 79, I shine so bright.
Hint: Think of precious metals used in jewelry and currency.
States of Water
Logic lab · Triple point conditions.
Hint: This is called the triple point of water.
DNA Base Pairs
Brain teasers · Complete the sequence.
Hint: Match each base with its pair: A↔T, G↔C.
Gravity Paradox
Logic lab · Which falls faster?
Hint: Think about what's different on the Moon versus Earth.
Chemical Equation
Brain teasers · Balance the reaction.
Hint: You need 2 oxygen atoms on the left to match the oxygen in water molecules.