

Original puzzles created for
persons and parents who enjoy sharing insights
with friends and family, the purpose
being
to celebrate processes and principles. Attention
teachers: Here is a probono resource for students in
STEM
 Science, Technology, Engineering,
Mathematics. Or you may think of this page as a garden. I sure do.  PN

Recreational Challenges
Alarm Clock Anomaly When plugandplay won't play.
Birthday Bet Winning a wager: It helps to know something that the loser does not know.
Chase Me, Catch Me Taking painful realities in stride.
CounterIntuitive Cork A puzzle from childhood that stumps adults.
CrossNumber Puzzle First of its kind, probably for a good reason.
Drawbridge Dilemma Exercise in consensus and ethics, assumptions and suppositions.
Droodle Generation Simple sketches  simple, once they are explained.
Erg and Ugh All play and no work defining units and energies.
Fuzzy Dice Dating one decorative talisman  and yourself.
Genesis Won One An instrument of modesty in art laid bare.
Literary Larvae Devouring pages while counting them.
Magnanimous Month Celebrating paydays and weekends with numbers.
Missing Letters Finding features in common without seeing them.
Mythical Muses Since they are not real, there is no limit on their numbers.
Train Speed A puzzle from childhood that stumps adults.
Alphabet Group Never have so many attributes belonged to so few.
Balls in Boxes Sometimes it helps to draw a map of alternatives.
Battle of the Buns It may be OK not to make the pegs fit the holes.
Benford's Law Something for taxpayers to know to avoid audits.
Bottle Royal Elementary exercise for a long, rainy weekend..
Bucketing Bandwidth Metaphor for managing a misleading metaphor.
Challengee vs Challenger Winning wager tempting to make/take  or not.
Circling: Ground and Sky Faster in one way but slower in another.
Conservation of Bits Code compression will never go out of style.
Count the Squares Challenge for children in French and English.
Dérailleur de Rigueur Modern bicycle designs may have gone too far.
Fibonacci Fantasy Where parallel lines meet, so too do the rational and the irrational.
Golden Section Carried away by specious correlations.
Gold on the Wing A juvenile puzzle that stumps adolescents.
Hand Over Hand A real paradox  well, maybe not.
Inches per What? Share of mind owned by outdated technology.
Jump in a Lake You can drown in a lake but only if the lake is deep enough.
King for a Day An empire full of nextnumber puzzles.
Least Significant Digits Listening for a dog not barking.
Materix The statistics of romantic relationships.
Matches These matches are safe for children to play with.
Measuring the Moon Gauging the size of one particular faraway object.
MY Missile Relic of a Cold War stratagem with practical applications.
Next Number Making the most of what is given by making assumptions.
Odd Ball Using a balance scale without calibrated weights.
Paradox Lost Where parallel lines meet, so too do the infinite and the infinitesimal.
Polarity Happens An adolescent puzzle that stumps adults.
Reversible Ages Birthday greeting discloses numerical limits.
Romance in Numbers Looking back with nostalgia to prepositional notation.
Scale Steps Discovery of a new classification for musical instruments.
Secret Message High school puzzle that can stump an undergraduate.
Skateboard Mystery At the end of a jump, where does all the kinetic energy go?
SpaceTime Singularity Bizarre combination of location an time.
TwelveTone Melodies Making music with mathematical minimalism.
Word Problems Turning a homework dread on its head.
 World's Fastest Airliner
 World's Fastest Car
 World's Fastest Dragster
 World's Largest Machines
 World's Fastest Train
Band Around the Earth Junior college puzzle that stumps university graduates.
Carbon Footprint Getting carried away with electrical options.
Circloid Discovery of a valid hypothesis and another that is not valid.
Claim Game A bimodal distribution offers a complaintfree service.
Density Lock A counterintuitive proposal to prevent traffic jams.
Differationale Which solution is right and which solution is wrong.
Double Integrity Numerical mischief in defining the undefined.
Easy as Pi Approximating irrational numbers with rational numbers.
Factorial Factoids Looking for a missing most significant digit.
Five Axles Axle loading does not explain highway damage (prequel to Unsprung Secrets)
Historic Car Crash Time of maximum crushin volume seems to be a constant.
Linear Linkage Headlined uniqueness in the past found not to be unique.
Fermat's Really Last Theorem Power of foozling for making mathematical history.
LookatMe Car Form ever follows function, and function takes energy.
Magique Nombre All roads lead to the same number. But why?
Missing Numbers Finding boundless quantities of solutions.
NailBiter Ballots Most practical technology for voting is two centuries old.
Natural Hypoteneese What Pythagoras of Samos might do with a spreadsheet.
Next Superbowl Selecting your winning square in the office football pool.
Paranormal Numbers Algebra teacher with psychic powers  or so it seems.
Phantom Circuit Exploiting a variable that does not vary with dimension.
Price of a Point Rationalizing football's idiosyncratic scoring system.
Prime Numbers are Odd Attributes of the purest of integers.
Psychic Math Unraveling the secrets of sorcery.
Radicand Solution to one puzzle calls for new puzzles.
Randomly Wrong Challenges for humanderived randomness.
Rational Growth How to approximate an exponential function with a ratio.
Rational Roots Where parallel lines meet, so too do the infinite and the infinitesimal.
Reaman Numeral Reconstructing a singular midTwentieth Century discovery.
Reaman Numerals Plural Dancing with the dosido digits.
Recursive Sentence Real gambling payoff for real gamblers.
Repeating Decimal Decimals Producing proper rational fractions.
Revenge of the DAR Central tendency: mean and median do not always meet.
RondPoint Vehicular flow in a signalfree intersection
Roulette's Frets Mathematical induction for the derivation of 'totorial'.
Short Cut? Absence of information makes the solution more interesting.
Steamboat Hill Applying conservation retrospectively to one venerable technology.
Strange Series Mountains and foothills in one numerical algorithm.
TinCan Mystery Environmental reality: Holes pick the pegs not vice versa.
Tip of the Ice Cube Melting metaphor: floating on oceans vs resting on land.
To Brake or Not to Brake Analyzing the power in coasting.
Unsprung Secrets Proposed explanation for highway damage (sequel to Five Axles).
What the Wild Goose Knows Nature teaches us embarrassing things about us.
World's Fastest Car Analysis of the Bloodhound LSR.
World's Fastest Dragster Being first means getting there first, not speed.
World's Largest Machines Arguably the world's most obvious question.
Yaw of Averages Exploring a paradox in central tendencies.
Reasoning Meets the RailsConfusionFree Codes Not to be confused with commafree codes.
Express vs Local Getting more there trumps getting there faster.
Fast Track Analyzing the speed penalty of not going straight.
Pantograph Design Making improvements in an aerodynamic eyesore.
Single Tracking Operations versus capital costs in railroad emergencies.
Station Stop Understanding the true throughput limits in railway transit.
Streetcar Mystery Surprising realities in converging and diverging.
Trail Braking Finding the optimum speed for maximizing throughput.
Trip Time Figuring out the impact of having to serve passengers.
World's Fastest Train Tractive effort taxed by aerodynamic limits.
1. The Clock Won't Wait
2. Here Comes the Sun
3. Landfall Navigating
4. Live Reckoning
5. Point of No Return
6. Simplexity Aloft
7. Gathering Range
8. Shoot the Moon
9. Wages of Flight
10. Which way, Amelia?
AirRace What is the best cruise altitude for winning in the skies?
Canard Advantage Why put the horizontal stabilizer in the nose?
Cleared to Land One too many rules.
Flyer Fatality Wright Flyer tragedy: first in history but not the last.
Flying Off the Grid Electrical propulsion without stationary source.
Gathering Range What works has limits, what does not work does not.
Green Flight When conservation trumps speed.
Here Comes the Sun Racing against the sun.
Landfall Navigating Overcoming one type of navigation error.
Live Reckoning Steering by stars and by radio.
Pilot's Nightmare No time for calculation or controversy.
Point of No Return Decision delayed is decision denied.
Position and Hold Controversial maneuver  before takeoff.
Shoot the Moon In the daytime, celestial navigators have two celestial bodies, not one.
Simplexity Aloft Analysis of multiple, independent failures.
Sloping in the Dark Counterintuitive, 'black hole' approach.
The Clock Won't Wait As time goes by, so too does your position.
VTail Seeking information that is "not for public disclosure."
Wages of Flight Need to fly meets the need for speed.
Which way, Amelia? The greatest mystery in aviation history.
Wind Circle On the average, wind is not friendly to flight.
Wingsuit Aerodynamics How to maximize gliding distance.
World's Fastest Airliner Supersonic flight can spook cows and rattle school windows.
Zero Mystery In WWII, the Corsair was able to turn right faster than the Zero.
Space Stuff
Égaré (French for 'stray') Collection
0. Astrogating AsteroidsAstrogating Asteroids Discovery for avoiding a collision course with Planet Earth.
1. Rock from the Sky
2. Orbital Deflection
3. Prepositions in Space
4. What Goes Around
5. Plural Gravities
6. Extinction Avoidance
Aurora Borealis An amazing photograph no matter how you look at it.
Barycenterfold Object lesson provides perspective on solar system dimensions.
CornerCube Good enough may sometimes be better than perfect.
Ellipse Illusion Ellipse in a cylinder is intuitive, but in a cone, not so much.
Extinction Avoidance Preventing what will eventually happen.
How Many Planets? Historically named versus unknown or unnamed.
Martian Microbe Exciting discrepancy in genetic codes.
Measuring the Moon A penny for your perspective.
Mystery Orbit Space invention in search of a necessity.
Orbital Deflection Invention for the deflection of a threatening asteroid.
Plural Gravities Reality for asteroids goes beyond Keplerian Laws
Pocket Rocket Analysis of an elegant concept for achieving Inertial Propulsion.
Prepositions in Space Which way is 'up' and how long until 'next'?
Rock from the Sky Strategem for avoiding collision with a Near Earth Object (NEO)
To Billow or Not to Billow Cloudy evidence for "dark matter" in space.
Trampoline Deorbiting System Satellite with sacrificial derelict capturing mechanism.
Trappist Orbits Seven exoplanets in harmonious stability.
What Goes Around Figuring out arrival times at an orbital intersection.
Words and MeaningsCollective Nouns Matching the names for groups of things with the things.
Figures of Speech Names for expressions matched with what the expressions express.
Groaner of the Third Kind Classification of jokes, some funny but not all.
Largest Prime Number Like everything else, numbers need names.
Omancy Schmancy Twenty methods for figuring out the future.
Palindromes for All Times Historical and humorous reversibilities.
Paradigm Shift Wresting one's presumptions from one's grasp.
PutDown Noun Proper terminology for expressing scorn, polite or otherwise.
Riddle from Hell Finding the impact of nothing on everything.
Riddle?...or Hoax! On crooked postulations by juveniles and jokesters.
Surgical Precision Ungiven toast on a napkin.
Syllables of Recorded Time Conservation by acronym and abbrev., supposedly.
Techword Puzzle First of its kind, probably for a good reason.
Wholly Toledo Challenging creative children on long cartrips.
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