Puzzles with a Purpose
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 pro-bono resource for students in STEM -- Science, Technology, Engineering, Mathematics.  Or you may think of this page as a garden. I sure do.   -- PN
Six Collections...
Fun.........Recreational Challenges
L&R..........Logic and Reasonings
M/M.................Math and Models
R/R.....Reasoning Meets the Rails
Skies..............Puzzles in the Skies
S/S..............................Space Stuff
W/M............Words and Meanings
Special Feature...Amelianna Collection

Fun...Alarm Clock Anomaly
..Alphabet Group
S/S.....Aurora Borealis
L&R..Balls in Boxes
M/M..Band Around the Earth
L&R..Battle of the Buns
L&R..Benford's Law
Fun....Birthday Bet
L&R..Bottle Royal
L&R..Bucketing Bandwidth
Skies.Canard Advantage
M/M..Carbon Footprint
L&R..Challengee vs Challenger
Fun....Chase Me, Catch Me
L&R..Circling: Ground and Sky
M/M..Claim Game
Skies.Cleared to Land
The Clock Won't Wait
W/M..Collective Nouns
R/R...Confusion-Free Codes
L&R..Conservation of Bits
Fun....Counter-Intuitive Cork
L&R..Count the Squares
Fun....Cross-Number Puzzle
M/M..Density Lock New
L&R..Dérailleur de Rigueur
M/M..Double Integrity
Fun....Droodle Generation
M/M..Easy as Pi
S/S.....Ellipse Illusion
Fun....Erg and Ugh
R/R...Express vs Local
M/M..Factorial Factoids
R/R...Fast Track
M/M.Fermat's Really Last Theorem
L&R..Fibonacci Fantasy
W/M..Figures of Speech
M/M..Five Axles  New
Fun....Fuzzy Dice
Skies..Gathering Range
Fun....Genesis Won One
L&R..Golden Section
L&R..Gold on the Wing
Skies.Green Flight
Groaner of the Third Kind
..Hand Over Hand
Skies.Here Comes the Sun  
M/M..Historic Car Crash
S/S....How Many Planets?
L&R..Inches per What?
L&R..Jump in a Lake
L&R..King for a Day
Skies..Landfall Navigating
W/M..Largest Prime Number
L&R..Least Significant Digits
M/M..Linear Linkage
Fun....Literary Larvae
Skies..Live Reckoning
M/M..Look-at-Me Car
M/M..Magique Nombre
Fun....Magnanimous Month
S/S.....Martian Microbe
L&R..Measuring the Moon
Fun....Missing Letters
M/M..Missing Numbers
L&R..MY Missile
S/S.....Mystery Orbit
Fun....Mythical Muses
M/M..Nail-Biter Ballots
M/M..Natural Hypoteneese
L&R..Next Number
M/M..Next Superbowl 
W/M..Omancy Schmancy
W/M..Palindromes for All Times
R/R....Pantograph Design
W/M..Paradigm Shift
L&R..Paradox Lost
M/M..Paranormal Numbers
M/M..Phantom Circuit
Skies..Pilot's Nightmare
..Point of No Return
L&R..Polarity Happens
Skies..Position and Hold
M/M..Price of a Point
M/M..Prime Numbers are Odd
M/M..Psychic Math
W/M..Put-Down Noun
M/M..Randomly Wrong
M/M..Rational Roots 
Reaman Numeral
..Reaman Numerals Plural
M/M..Recursive Sentence
M/M..Repeating Decimal Decimals
M/M..Revenge of the DAR
L&R..Reversible Ages
W/M..Riddle from Hell
W/M..Riddle?...or Hoax!
L&R..Romance in Numbers
M/M..Roulette's Frets
L&R..Secret Message
Skies.Shoot the Moon
M/M..Short Cut?
Skies.Simplexity Aloft 
R/R...Single Tracking
Skies.Sloping in the Dark
L&R.Space-Time Singularity
R/R...Station Stop
M/M..Steamboat Hill
M/M..Strange Series
R/R...Streetcar Mystery
W/M..Surgical Precision
W/M..Syllables of Recorded Time
W/M..Techword Puzzle
M/M..Tin-Can Mystery 
M/M..Tip of the Ice Cube
S/S.....To Billow or Not to Billow
M/M..To Brake or Not to Brake
R/R...Trail Braking
Fun....Train Speed
R/R...Trip Time
L&R..Twelve-Tone Melodies
M/M..Unsprung Secrets  New
Skies..Wages of Flight
M/M..What the Wild Goose Knows
Skies.Which way, Amelia?
W/M..Wholly Toledo
Skies..Wind Circle 
L&R..Word Problems
Skies..World's Fastest Airliner
M/M..World's Fastest Dragster
R/R...World's Fastest Train
M/M.World's Largest Machines
M/M.Yaw of Averages
Skies..Zero Mystery

On April 22, 2010, during the celebration of the 20th anniversary of the Hubble Space Telecope, NASA released the image above, describing it as "a pillar of gas and dust three light-years tall being eaten away by the brilliant light from nearby bright stars."   This cosmic pinnacle lies within the Carina Nebula, located 7,500 light-years away.  Not far at all, considering that the Milky Way Galaxy measures 100,000 light years in diameter.

Fun....Recreational Challenges


Alarm Clock Anomaly  When plug-and-play 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.
Counter-Intuitive Cork  A puzzle from childhood that stumps adults.
Cross-Number Puzzle   First of its kind, probably for a good reason.
Droodle Generation   Simple sketches -- once they are explained.
Erg and Ugh   All play and no work defining units and energies.
Fuzzy Dice   Dating one decorative talisman -- and one's self.
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. 

L&R......Logic and Reasonings

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 an 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 next-number 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 far-away object.
MY Missile  Relic of a Cold War stratagem with practical applications.
Next Number  Making the most of what is given by making assumptions.
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 pre-positional notation.
Secret Message  High school puzzle that can stump an undergraduate.
Space-Time Singularity  Bizarre combination of location an time.
Twelve-Tone Melodies  Making music with mathematical minimalism.
Word Problems  Turning a homework dread on its head.

M/M.....Math and Models

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 complaint-free service.
Density Lock A counter-intuitive 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 doe not explain highway damage (prequel to Unsprung Secrets)
Historic Car Crash  Time of maximum crush-in 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.
Look-at-Me Car  Form ever follows function, and function takes energy.
Magique Nombre All roads lead to the same number.  But why?
Missing Numbers Finding unboundable quantities of solutions.
Nail-Biter 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 scorring system.
Prime Numbers are Odd   Attributes of the purest of integers. 
Psychic Math    Unraveling the secrets of sorcery. 
Randomly Wrong   Challenges for human-derived randomness.
Rational Roots   Where parallel lines meet, so too do the infinite and the infinitesimal.
Reaman Numeral    Reconstructing a singular mid-Twentieth Century discovery.
Reaman Numerals Plural   Dancing with the do-si-do digits.
Recursive Sentence   Real gambling pay-off for real gamblers.
Repeating Decimal Decimals    Producing proper rational fractions.
Revenge of the DAR    Central tendency: mean and median do not always meet
Roulette's Frets   Mathematical induction for the derivation of totorials. 
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.
Tin-Can 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 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.

R/R.....Reasoning Meets the Rails

Confusion-Free Codes   Not to be confused with comma free 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 eye-sore.
Single Tracking  Operations vs capital costs in railroad emergencies.
Station Stop  Understanding the true through-put limits in railway transit.
Streetcar Mystery  Surprising realities in converging and diverging.
Trail Braking   Finding the optimum speed for maximizing through-put.
Trip Time  Figuring out the impact of having to serve passengers. 
World's Fastest Train   Tractive effort taxed by aerodynamic limits.

Skies......Puzzles in the Skies 

Amelianna Collection

 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?

Canard Advantage  Why put the horizontal stabilizer in the nose?
Cleared to Land
   One too many rules.
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   Counter-intuitive, 'Black Hole' approach. 
The Clock Won't Wait   As time goes by, so too does your position.
V-Tail  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.
World's Fastest Airliner   The impact on speed of environmental impact.
Zero Mystery In WWII the Corsair was able to turn right faster than the Zero.

S/S..............................Space Stuff

Aurora Borealis  An amazing photograph no matter how you look at it.
Barycenterfold  Object lesson provides perspective on solar system dimensions.
Corner-Cube   Good enough may not always be better than best.
Ellipse Illusion  Ellipse in a cylinder is intuitive, but in a cone, not so much.
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.
To Billow or Not to Billow  Cloudy evidence for Dark Matter in space.

W/M......Words and Meanings

Collective 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.
Put-Down 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 car-trips.

ISBN 1-58922-230-9

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