Maths Challenge
Maths challenge.net: Shaded Grid
A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find the patterns.
University of Cambridge
University of Cambridge: Nrich: Dicey Operations
Dice throwing games are played with a 0-9 dice and teams of two. Students should understand why are some cells more significant than others, how do you decide which targets are appropriate, and what are effective strategies for placing...