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- DX. Dumb Robots
- DW. The Online Encyclopedia of Integer Sequences!
- DV. Dealing with Chaos
- DU. Chaos at the Card Table
- Follow Up: Smullyan’s Paradoxes!
- DT. Speaking of Self-reference
- DS. Math Chat With Frank Morgan
- DR. Double Bubble
- DQ. We Are Not Liars
- DP. Would Chuck Wood
- DO. Proofs Puzzles and Conundra!
- DN. Ed Burger’s Trouser Puzzle
- DM. On Codes, Primes and Kings
- DL. The Wicked King Problem
- Greetings From The Math Factor
- DK. Flipping the Mattress
- DJ. Pegg on Numb3rs
- Follow Up: Prime Dice
- DI. Dice Games
- DH. Ice Cream Cake
- Q&A: Deal or No Deal
- Q & A: A little puzzle
- DG. Ants on a Rod
- DF. The Best Full House
- DE. The Apples In Stereo
- DD. Should We Teach College Algebra?
- DC. Psychology Matters
- DB. Envelope Mystery
- DA. A Cake Conundrum
- CZ. A Parlour Trick
- CY. Number Sleuths
- Follow Up: Escaping the Beast
- CX. The Princess and A Beast
- CW. The Surreal Numbers
- CV. Dividing the Loot
- CU. Eminently Logical Pirates
- CT. Odd People
- Follow-up: Weird sums
- CS. Perfect Sums
- CR. Clock Confusion
- CQ. Dollar Auction
- CP. The Prisoners Dilemma
- Follow-up: Mismatched Pennies
- Q&A: Numerous Numbers
- CO. Mismatched Pennies
- CN. Name That Date
- CM. Crossing the Bridge
- CL. Some Number of Numbers Sum
- CK. The Third Tree
- Follow-up: The Stork and The Frog
- CJ. The Stork and the Frog
- CI. The Royal Order of the Garter
- CH. Rayo’s Number!
- Follow-up: Graham’s Number
- CG. Graham’s Number
- Q&A: The Race
- CF. Mind Boggling!
- CE. Big Numbers
- Q&A: Why is 0! = 1?
- CD. Alas, Up To A Million Dollars Might Have Been Given Away.
- CC. Fair Division
- CB. Pi Day
- CA. Cut the Cake!
- BZ. Two Teams
- BY. Guests at a Party
- BW. The Math Factor Million Dollar Give Away!!!
- BV. 9’s Strike Again
- BU. The Online Mind Reader
- BT. A Runcinated Dodecaplex
- BS. Aha! Escape!
- BR. We Don’t Know the Way Out!
- BQ. The Smuggler is Paid
- BP. The Smuggler’s Fee
- BO. When did you say?
- BN. Puzzling Panelists
- BM. An astronomical cost!
- BL. Eternally diminishing returns
- BK. Bananas and Rockets
- BJ. The Most Powerful Force
- BI. The Shape of the Universe
- BH. The Poincaré Conjecture
- BG. Bamboopalooza!
- BF. Catching Errors
- BE. Trap door encryption
- BD. Magic Numbers
- BC. Casting Out Nines
- BA. The Ring is Exchanged
- AZ. Another puzzle from Peter Winkler
- AY. Dollar Cost Averaging
- AX. Averages are not what they seem!
- AW. Will we run out of Social Security Numbers?
- AV. Dennis Shasha Answers
- AU. Dennis Shasha asks about Polish Multiplication
- AT. Peter Winkler Answers
- AS. A Puzzle From Peter Winkler
- AR. A Quick Game
- AQ. The Principle of Indifference Redux
- AO. Choosing Balls from A Bag
- AN. More Sucker Bets
- AM. Arrow's Theorem
- AL. Rumors and suckers
- AK. Paradoxes and Liars
- AJ. The Pop Quiz
- AI. Census Taker's Puzzle
- AH. QED
- AG. The Eagle
- AF. Counting All Rationals
- AE. The Jalopy
- AD. Bigger and Smaller Infinities
- AC. No Vacancy
- AB. The Rational Ruler
- AA. The Way Out of the Forest
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