Contents of Volume 31,

**Journal of Recreational Mathematics**# Number 1

Announcement

“Tangle Series and Tanglegrams: A New Combinatorial Puzzle,”
by K. C. B. Chan

“Some Divisibility Patterns in the Smarandache
Deconstructive Sequence,” by Russell Euler and Jawad Sadek

“Tiling with Similar Polyominoes,” by Michael Reid

“An Error Found in Lucacs and Tarjan’s ‘Mathematical
Games’,” by Misty LaPlante, James Hatch and Thomas E. Moore

“A Purely Pandiagonal 4*4 Square and the Myers-Briggs Type
Table,” by Peter D. Loly

“The Problem of Sawing a Chain,” by Kiran R. Bhutani and
Alexander B. Levin

“A New Master Mind Codegenerator,” by B. Ulmann

“Shotgun!” by Aaron T. Copeland, David J. Greiner, Brian D.
McGregor, Laura W. Woodward and Paul M. Sommers

“More 666 Curiosa,” by Michael Keith

“Postscript to a Chessboard Problem: A Proof Without
Pigeons,” by Tony Chambers

“The Neighbors of the Beast,” by Douglas Iannucci

Book Reviews, edited by Charles Ashbacher

Alphametics and Solutions to 30(1) Alphametics, edited by
Steven Kahan

Solvers List for Alphametics 29(4), 30(1)

Problems and Conjectures, edited by Colin R. J. Singleton

Solutions to Problems and Conjectures, edited by Colin r. J.
Singleton

Proposers and Solvers’ List for Problems and Conjectures
30(1)

Errata

# Number 2

“An Approximation to the Area of a Regular Polygon,” by John
R. Hendricks

“Knights Covers on N x N Chessboards,” by Bernard F. Lemaire

“The Generalized Jug Problem,” by Thomas J. Pfaff and Max M.
Tran

“Powerful Digital Roots,” by Sara Kahan

“Calc Play,” by Bob Mead

“Concatenation on Magic Squares,” by Emanuel Emanouilidis

“The Digital Root of a Fermat Number,” Thomas Koshy

“Notes on a Semi-Symmetrical Random Walk,” by William M.
Waters, Jr.

“Why Men (And Octopuses) Cannot Juggle a Four Ball Cascade,”
by A. Engels and S. Mauw

Book Reviews, edited by Charles Ashbacher

Alphametics and Solutions to 30(2) Alphametics, edited by
Steven Kahan

Solvers List for Alphametics 30(2)

Problems and Conjectures, edited by Lamar Widmer

Solutions to Problems and Conjectures, edited by Lamarr
Widmer

Proposers and Solvers’ List for Problems and Conjectures
30(2)

Letter From the Editor

# Number 3

“Franklin’s ‘Other’ 8-Square,” by Paul C. Pasles

“Magic L(ighting),” by Edward W. Shineman, Jr.

“On a Generalization of Perfect Numbers,” by Joseph J. Pe

“Odd King Tours on Even Chessboards,” by D. Joyner and M.
Fourte

“Some Same Sums of Digits,” by Steven Kahan

“The Ends of a Fermat Number,” by Thomas Koshy

“An Average Cribbage Score,” by Philip Maynard

“Heron Triangles with Sides in Arithmetic Progression,” by
J. A. MacDougall

“Characterization of Eban Numbers,” by J. C Hernandez, C.
Mex-Perera and Simon J. Shepherd

“March Madness: The Racket in Regional Brackets,” by
Christopher E. Fanning, Kyle J. Pilkington, Tyler A. Conrad and Paul M. Sommers

“Hinged Dissection of the Alphabet,” by Erik D. Demaine and
Martin L. Demaine

Book Reviews, edited by Charles Ashbacher

Alphametics and Solutions to 30(3) Alphametics, edited by
Steven Kahan

Solvers List for Alphametics 30(3)

Problems and Conjectures, edited by Lamar Widmer

Solutions to Problems and Conjectures, edited by Lamarr
Widmer

Proposers and Solvers’ List for Problems and Conjectures
30(3)

# Number 4

“Name That Prime,” by Monte J. Zerger

“An Anything-but-Average Average,” by Steven Kahan

“

*Big Mac*roeconomic Analysis,” by Paul M. Sommers
“The IQ-Block: An Interesting Polyomino Puzzle,” by Colin
Ramsay

“Dottable Fractions,” by Michael Keith

“Risk Management and the Two-Envelope Paradox,” by Edwin F.
Meyer

“Grandpa’s Triangle,” by Sarah Virginia Cook

Book Reviews, edited
by Charles Ashbacher

Alphametics and Solutions to 30(4) Alphametics, edited by
Steven Kahan

Solvers List for Alphametics 30(4)

Problems and Conjectures, edited by Lamar Widmer

Solutions to Problems and Conjectures, edited by Lamarr
Widmer

Proposers and Solvers’ List for Problems and Conjectures
30(4)

Wanted Poster

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