• Linear Diophantine Tidbits
• Tree in a Grid
• Sum
• Water Tanks EXTREME
• Where is the ‘back’ button?
• Reservoir Logs
• Who Said Crisis?
• Go Alonso Go!
• Wedding Shopping
• Water Restrictions
• Dancing the Cheeky-Cheeky
• Traveling Fishmonger
• Very Well Informed Domino Player
• Behold My Quadrangle
• Trainsorting
• Classified
• Hot Spot
• Snakes and Ladders
• Balance
• Square Numbers
• Age Sort
• Commandos
• Even Parity
• Count the Polygons
• Largest Prime Divisor
• Pythagorean Triangles
• Substring
• Treasure Hunt
• Square Sums
• Arrange the Tiles
• Beautiful Numbers
• Campus Roads
• Dying Tree
• Extend to Palindromes
• Factorizing Large Integers Given an integer N (≤ 1016) find its prime factoring.
• Game of Rectangles
• Halum
• Is this the easiest problem?
• Jimmy’s Balls
• Arrange the Numbers
• Building a Triangular Museum
• Code Creator
• Document Object Model
• Extreme Discrete Summation
• Finding Paths in Grid
• Gathering Food
• Hyper Prefix Sets
• Integer Game
• Just Another Problem
• Erasing and Winning
• Babel
• The Club Ballroom
• Queen
• Bubbles and Buckets
• Musical Loop
• Set
• Division of Nlogonia
• Longest Increasing Sub-sequence
• Vampires
• Laurel Creek
• Rocket Stages
• Virtual Friends
• Dominos
• Logo
• Angry Programmer
• Bender B. Rodr ́iguez Problem
• Life on Mars?
• Touring Robot
• Erd ̈os Unit Fractions
• Frieze Patterns
• GATTACA
• 9 Puzzle
• Batman
• Cranes
• WiFi
• Exact Change
• Dominos 2
• Logo 2
• Fill the Square
• Compressor
• Pyramid Number
• Recycling
• In-Circle
• Permutation
• H(n)
• Morning Walk!
• Switch Grid
• Strange Tax Calculation
• SMS Typing
• Solve the Broken Maze
• Simple Adjacency Maximization Find the smallest integer N that has both of the following properties:
• Special Number
• Say Goodbye to Tic-Tac-Toe
• Set of Marbles
• Smallest Sub-Array
• Secret Problemetters Union
• Chess Queen
• Another Word Game
• Sultan’s Chandelier
• Decoding