article
Corresponding sudokus
This second Sudoku article discusses "Corresponding Sudokus" which are pairs of Sudokus with terms that can be matched using a substitution rule.
Working systematically
article
Maths trails
The NRICH team are always looking for new ways to engage teachers
and pupils in problem solving. Here we explain the thinking behind
maths trails.
page
Making maths: double-sided magic square
Make your own double-sided magic square. But can you complete both
sides once you've made the pieces?
list
Working systematically - short problems
A collection of short Stage 3 and 4 problems on Working Systematically.