Featured Puzzle: Mathrax # 2
Mathrax originated on the German puzzle website janko.at. Fill in numbers from 1 to 9, such that no row or column contains any duplicate numbers. Sounds pretty normal so far, right? Now let’s add math!
Featured Puzzle: Mathrax #1
Mathrax originated on the German puzzle website janko.at. Fill in numbers from 1 to 7, such that no row or column contains any duplicate numbers. Sounds pretty normal so far, right? Now let’s add math!
Featured Puzzle: Mathrax #3 – Elephant Calculation
Today is National Elephant Appreciation Day, so I thought it would be a cute theme for a Mathrax puzzle. Fill in the grid with the numbers 1-9 so that no digit repeats in any row or column.
Featured Puzzle: Safecracker #1
I wanted to do something different than the standard Mastermind-style Crack the Code puzzles. Sometime back, I stumbled across this Dutch presentation of the concept, which uses a series of equation clues.