Puzzle Catalog - Page 15 of 16

Logic Line 558

Logic lab · Digit drift #558

Hint: Break the number into digits and add them.

Riddle Run 559

Riddle lounge · Quick math #559

Hint: Multiply before you subtract.

Teaser Track 560

Brain teasers · Sequence study #560

Hint: Each term rises by 3.

Logic Line 561

Logic lab · Digit drift #561

Hint: Break the number into digits and add them.

Riddle Run 562

Riddle lounge · Quick math #562

Hint: Multiply before you subtract.

Teaser Track 563

Brain teasers · Sequence study #563

Hint: Each term rises by 6.

Logic Line 564

Logic lab · Digit drift #564

Hint: Break the number into digits and add them.

Riddle Run 565

Riddle lounge · Quick math #565

Hint: Multiply before you subtract.

Teaser Track 566

Brain teasers · Sequence study #566

Hint: Each term rises by 3.

Logic Line 567

Logic lab · Digit drift #567

Hint: Break the number into digits and add them.

Riddle Run 568

Riddle lounge · Quick math #568

Hint: Multiply before you subtract.

Broken Promise

Riddle lounge · I'm broken before I'm used, but I help you start your day.

Hint: Think breakfast foods that need cracking.

Three Doors Advanced

Logic lab · One door leads to freedom, two lead to danger, but the guards have their own agenda.

Hint: Ask a question that creates a logical loop forcing two guards to agree.

Water Jug Challenge

Brain teasers · Measure exactly with imprecise tools.

Hint: Fill one jug and pour into the other, keeping track of what remains.

The River's Daughter

Riddle lounge · Born in mountains, dies in the sea, never stops moving.

Hint: Geography and nature combined.

Poisoned Wine

Logic lab · Find the deadly bottle with minimal sacrifice.

Hint: Use binary representation—each prisoner represents a binary digit.

Clock Angle

Brain teasers · How many degrees separate the hands?

Hint: The hour hand moves between numbers as minutes pass.

Invisible Servant

Riddle lounge · Always working, never seen, the harder you chase, the faster I flee.

Hint: Found in almost every room, ticking away.

Hat Color Logic

Logic lab · Save your team by seeing what you cannot know.

Hint: The person in back can sacrifice themselves to encode information.

Birthday Paradox

Brain teasers · Fewer people than you think creates a collision.

Hint: It's surprisingly small—less than 30.

Eternal Builder

Riddle lounge · I build castles but have no hands, I shape mountains but have no tools.

Hint: Think of beach toys and deserts.

Monty Hall Variant

Logic lab · Four doors, two prizes, one elimination.

Hint: Calculate the probabilities before and after the reveal.

Rope Burn Timer

Brain teasers · Measure time with inconsistent fuses.

Hint: Light multiple ends simultaneously.

Word Transformer

Riddle lounge · Add one letter, flip the meaning.

Hint: Think about the sun and compass directions.

Light Bulb Switches

Logic lab · Four switches, one bulb, one chance to enter.

Hint: You need more information than just on/off.

Handshake Count

Brain teasers · Every pair shakes once—how many total?

Hint: Use the combination formula: n × (n-1) ÷ 2

Speaking Silence

Riddle lounge · I speak without a mouth and hear without ears.

Hint: Caves and canyons know me well.

River Crossing Fox

Logic lab · Transport everyone safely across.

Hint: Make multiple round trips and think about what can be left together.

Sum to Hundred

Brain teasers · Insert operators between digits.

Hint: One solution: 123 - 45 - 67 + 89 = 100

Growing Smaller

Riddle lounge · The more you take away, the larger I become.

Hint: Digging creates me.

Blue Eyes Island

Logic lab · Perfect logicians deduce their escape.

Hint: This triggers a chain of inductive reasoning over many days.

Missing Dollar

Brain teasers · Where did the dollar go?

Hint: The $27 already includes the bellhop's $2.

Ancient Invention

Riddle lounge · Older than wheels, still used daily.

Hint: Communication and humor combined.

Airplane Seats

Logic lab · What are the odds you get your assigned seat?

Hint: Surprisingly, it's exactly 50%.

Pirates' Gold

Brain teasers · Democratic pirates divide the treasure.

Hint: Work backwards from 2 pirates.

Two Fathers, Two Sons

Riddle lounge · Three people, three fish, yet two of each relationship.

Hint: One person satisfies two descriptions.

Hundred Prisoners

Logic lab · A 31% survival strategy against impossible odds.

Hint: Don't search randomly—follow the number chains.

Chessboard Grains

Brain teasers · Exponential growth surprises the king.

Hint: Use the formula for a geometric series: 2^64 - 1

Umbrella Paradox

Riddle lounge · Most useful when you're not using it.

Hint: Rainy day companion.

Cheryl's Birthday

Logic lab · A deduction puzzle that went viral.

Hint: Albert's statement eliminates months with unique days.