(Phi)ve is a Magic Number
Math
James Joseph Solberg
G4G13 Gift Exchange Book
G13-P045
Life Algorithms
Math
Tomas Rokicki
G4G13 Gift Exchange Book
G13-P044
Chiral Icosahedral Hinge Elastegrity‚Äôs Geometry of Motion
Math
Eleftherios Pavlides
G4G13 Gift Exchange Book
G13-P043
Mental Factoring Cheat Sheet
Math
Hilarie Orman
G4G13 Gift Exchange Book
G13-P042
Playing nice with a crooked coin
Math
Ryan William Morrill
G4G13 Gift Exchange Book
G13-P041
2184 (Oh, the Absurdity)
Math
Dana Mackenzie
G4G13 Gift Exchange Book
G13-P040
A Mathematical Walk in Decatur
Math
Ron Lancaster
G4G13 Gift Exchange Book
G13-P039
A Way to Derive the Spidron Formulas
Math
Gergö Kiss
G4G13 Gift Exchange Book
G13-P038
Repetitive Patterns in the Juggler Sequence
Math
Gabriel Doran Kanarek
G4G13 Gift Exchange Book
G13-P037
Difference Dice
Math
Brian Hopkins
G4G13 Gift Exchange Book
G13-P036
Linked Circles, Space Numbers and Space logic
Math
Douglas Engel
G4G13 Gift Exchange Book
G13-P035
The Bandaged Cube
Math
Joseph Cassavaugh
G4G13 Gift Exchange Book
G13-P034
Why Do the Unit Quaternions Double-Cover the Space of Rotations?
Math
Neil Bickford
G4G13 Gift Exchange Book
G13-P033
Foxtrot Half-Empty Half-Full Problem Including 13
Math
Thomas Banchoff
G4G13 Gift Exchange Book
G13-P032
Conned Again, Watson! - Gardner's Two Child Problem Re-visited
Math
Anais Acree
G4G13 Gift Exchange Book
G13-P031