Australian Math Trust
55 Problems to Solve
Brilliant.org
Prison Cell Problem
Transum Tunnels
Transum Puzzles
Mind Your Decisions
25 Horses - Which is the Fastest?
Logic Puzzle #1
Logic Puzzle #2
The Bridge Puzzle
Three Gods Riddle
The Giant Spider Riddle
Brain Teasers #1
Circuit Puzzles
Cryptogram Puzzles
Campsite Puzzles
Balance Quest
Logic Puzzles
Laser Grids
Sudoku Puzzles
