• Uno game

• The Incredible Pile Machine

• Tetravex solver

• Interpreting Old Maps

• The Minimum Slot Machine

• Popes

• A Homer's Holiday

• Car Rallying

• Gaussian Primes

• Ambiguous or Incomplete Inductive Definitions

• Taxicab Numbers

• Spelling Corrector

• Custom Language

• Police Road Blocks

• Lost Inheritances

• Circular

• Constellations

• AlienAlgebra

• Particles

• Towers

• Horizon Line

• The Guessing Game

• Kaprekar Numbers

• Gutenberg Clumsy Helper

• Bridge Building

• Old West Rumours

• Lemmings Battle!

• The Abominable Triangleman

• X-Express

• Systematic Cyclic Redundancy Check Codes

• Cube

• Localized Summing for Blurring

• Finding Haplotypes

• Round and Round Maze

• How Many?

• Maternity

• Many Paths, One Destination

• Su Doku

• Diving for Gold

• Safe Salutations

• Customer Service Cost Evaluation

• Product of digits

• POP

• Super Divisible Numbers

• Find the Sequence

• Show the Sequence

• Dendogram

• Book signatures

• Airport Configuration

• 奶酪里的老鼠 Say Cheese

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