Contents of Volume 5,

**Journal of Recreational Mathematics,**1972# Number 1

“More
Mathematics on Stamps,” by William L. Schaaf

“The Columbus Quadratic,” by S. J. Kochaṅski

“On Palindromic Squares of Non-Palindromic Numbers,” by
Gustavus J. Simmons

“The F-Pentacube Problem,” by J. M. M. Verbakel

“Several Star Dissections,” by Greg N. Frederickson

“Some Polyautomorphic Numbers,” by J. A. H. Hunter

“Normal Magic Triangles of Order n,” by Terrel Trotter, Jr.

“Chains of Integrally Circumspect Squares,” by R. Robinson
Rowe

“Card-Return Numbers,” by Nobuyuki Yoshigahara

“That Fifth Card!” by M. H. Greenblatt

“Edge-Antimagic Tetrahedrons With Rotating Triads,” by
Charles W. Trigg

“The Third-Order Magic Cube Complete,” by John Robert
Hendricks

“The Pan-3-Agonal Magic Cube,” by John Robert Hendricks

“Mersenne Primes – The Last Three Digits,” by William
Raymond Griffin

“Egyptian Fractions,” by Bernhardt Wohlgemuth

Problems and Conjectures

Alphametics

Solutions to Problems and Conjectures

“Solution to Problem Posed in ‘Chains of Integrally
Circumscript Squares’ on Page 33,” by R. Robinson Rowe

Late Solutions

Errata

Index for Volume 4

Illustrations

William Schaaf, Greg
N. Frederickson, and Joseph S. Madachy

**Number 2**

“Detective at the Chessboard,” by Mannis Charosh

“Domino and Superdomino Recreations – Part 4,” by Wade E.
Philpott

“Repdigits as the Difference of Patterned Squares,” by
Charles W. Trigg

“Why Not Divide by Zero?” Kenneth C. Levine

“Assemblies of Twelve-Pointed Stars,” by Greg N.
Frederickson

“A Solitaire Game and Its Relation to a Finite Field,” by N.
G. de Bruijn

“Perfectly Odd Squares,” by Mark A. Ricci

“Integer Oddities,” by J. A. H. Hunter

Problems and Conjectures

Errata

Alphametics

Letter to the Editor

Solutions to Problems and Conjectures

Late Solutions

Illustrations

N. G. de Bruijn,
Greg N. Frederickson and Joseph S. Madachy

# Number 3

“The History and Discovery of Amicable Numbers – Part 2,” by
Elvin J. Lee and Joseph S. Madachy

“Sums of Factorials,” by Victor G. Feser

“Domino and Superdomino Recreations – Part 5,” by Wade E.
Philpott

“Some Expressions of Years,” by Victor G. Feser

“Latin Squares Under Restriction, and a Jumboization,” by N.
T. Gridgeman

“Magic Squares with Nonagonal and Decagonal Elements,” by
Charles W. Trigg

“The Pan-3-Agonal Magic Cube of Order 5,” by John Robert
Hendricks

“The Ten Digits in the Smallest Pythagorean Triangle,” by
Charles W. Trigg

“The Vicious Circle,” by R. Robinson Rowe

“Cubo-Caibo,” by Douglas Engel

“Is Zero Really Necessary?” by Maxey Brooke

“The 1-4-6-9 and Related Problems,” by David A. Bonyun

Problems and Conjectures

Alphametics

Errata

“Detective at the Chessboard (Solutions),” by Mannis Charosh

Illustrations

Douglas Engel, N. T.
Gridgeman and Joseph S. Madachy

# Number 4

“The History and Discovery of Amicable Numbers Part 3,” by
Elvin J. Lee and Joseph S. Madachy

“Magic Squares Embedded in a Latin Square,” N. T. Gridgeman

“Product Dates,” by Victor G. Feser

“Annual Sums,” by Victor G. Feser

“A Note on the Distribution of Primes in Arithmetic
Progression,” by Thomas E. Moore

“Consecutive-Digit Primes – Again,” by Joseph S. Madachy

“Polygon Assemblies,” by Greg N. Frederickson

Letters to the Editor

Book Reviews

“Construction With Pentacubes,” by N. R. Wagner

“Geometric Arrangements of Flashing Lights,” by Greg N.
Frederickson

“DIM: Three-Dimensional SIM,” by Douglas Engel

“Some Interesting Properties of Spherical Motion,” by
Douglas Engel

“Squares of the Form abcabc,” by Charles W. Trigg

“Antimagic Squares With Sums in Arithmetic Progression,” by
Charles W. Trigg

“The Road to Geba Oasis,” by Donald Cross

Problems and Conjectures

“Rate Your Wits (Show Me’s),” by David L. Silverman

Alphametics

Solutions to Problems and Conjectures

Late Solutions

Answers to “Rate Your Wits (Show Me’s)”

Solutions to “Road to Geba Oasis”

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