Contents of Volume 20,

**Journal of Recreational Mathematics**# Number 1

“Coloring the Perfect Squared Square,” by Earl S. Kramer and
Spyros S. Magliveras

“How to Play Chess Optimally,” by Anthony J. Dos Reis

Letter to the Editor

“Arithmetic Progressions in Nine-Digit Square Arrays,” by
Charles W. Trigg

“Some Ordinary Magic Cubes of Order 5,” by John Robert
Hendricks

“A Magic Cube of Order 7,” by John Robert Hendricks

“Related Magic Squares,” by Allan William Johnson Jr.

“More Scouts in the Desert,” by Andrew Simoson and Scott G.
Woolley

“Cyclic Geometric Progressions in Base Five,” by Charles W.
Trigg

“Relationships
Between Prime-Rich Euler-Type Equations and a Triangular Array of the
Odd Integers,” by Robert S. Sery

“Triangular Array of the Odd Integers,” by Robert S. Sery

“Wondrous Numbers – Conjecture about the 3n + 1 Family,” by
Blanton C. Wiggin

“How to Raise Your Bowling Scores,” by Thomas A. Gittings
and William A. Strauss

“How to Obtain Three Answers From a Single Yes-No Question,”
by Akihiro Nozaki

“That Perfectly Beastly Number,” by Charles W. Trigg

“Isolated 1’s in the Sequence of Leftmost Digits of 7^n,” by
James L. James

“A Palindrome (151) of Palindromic Squares,” by Rudolf
Ondrejka

Alphametics and Solutions to 19(1) Alphametics, edited by
Steven Kahan

Problems and Conjectures, edited by Joseph S. Madachy

Solvers’ List

# Number 2

“Scouting Out Tilings,” by Andrew Simoson

“Pandiagonal Magic Squares of Odd Order by Pocket Computer,”
John Robert Hendricks

“Magic Cubes of Odd Order by Pocket Computer,” by John
Robert Hendricks

“Nonamorphic Numbers,” by Charles W. Trigg

“Magic Pentagram Solutions Over GF(2),” by Harold Reiter

“Sequential Search Strategies With Mastermind Variants –
Part 1,” by Merrill M. Flood

Fifteenth Annual Student Conference

“Prime Sums of Squares of Digits of Primes,” by Charles W.
Trigg

“Using Probabilities to Analyze Your Bowling Game,” by
Thomas A. Gittings

Alphametics and
Solutions to 19(2) Alphametics, edited by Steven Kahan

Problems and Conjectures, edited by Joseph S. Madachy

Sixteenth Annual Mathematics and Statistics Conference:
Mathematical Recreations

Solutions to Problems and Conjectures, edited by Joseph S.
Madachy

Solvers’ List

# Number 3

“Megalithic Triangles,” by Martin Beech

“Complimentary Prime Pairs,” by Charles W. Trigg

“Sequential Search Strategies with Mastermind Variants –
Part 2,” by Merrill M. Flood

“Tennis Odds Anyone?” by Harvey Dubner

“Oddest Primes,” by Harvey Dubner

“The Diagonal Rule for Magic Cubes of Odd Order,” by John
Robert Hendricks

“Contatenated Repdigits Form Figurate Numbers in Base Four,”
by Charles W. Trigg

“More Pandiagonal Magic Squares,” by John Robert Hendricks

“9 and 10 Distinct Digits in Hexagonal Numbers,” by Charles
W. Trigg

Letters to the Editor

“Prime Triplets in Arithmetic Progression Starting With 3,”
by Harvey Dubner

“A Consecutive-Prime 3 x 3 Magic Square,” by Harry L. Nelson

Book Reviews, edited by Charles W. Trigg

Alphametics and Solutions to 19(3) Alphametics, edited by
Steven Kahan

Problems and Conjectures, edited by Joseph S. Madachy

Solutions to Problems and Conjectures, edited by Joseph S.
Madachy

Solvers’ List

# Number 4

“Just How Impossible Is It?’ by Richard L. Francis

“A Bracelet of Dyads for 1988,” by Charles W. Trigg

“Digits Embedded in Adages –1,” Charles W. Trigg

“The Third Order Magic Tessaract,” by John Robert Hendricks

“Two Dissections in 3-D,” by David Paterson

“1988 Haricot,” by Charles W. Trigg

“Another Magic Tessaract of Order 3,” by John Robert
Hendricks

“Surname Stabilization,” by Douglas J. Lanska

“Creating More Magic Tessaracts of Order 3,” by John Robert
Hendricks

“Triangular Permutations of Consecutive Digits,” by Charles
W. Trigg

“Prime-Factorials Revisited,” by Charles Ashbacher

“A Player’s Chances of Winning a Tennis Game and Its
Expected Length,” by Curtis N. Cooper and Robert E. Kennedy

Alphametics and Solutions to 19(4) Alphametics, edited by
Steven Kahan

Solutions to Problems and Conjectures, edited by Joseph S.
Madachy

Letter to the Editor, from Harry L. Nelson

Solvers’ List

Errata

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