article
Impuzzable
This is about a fiendishly difficult jigsaw and how to solve it
using a computer program.
Working systematically
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articleLatin squares
A Latin square of order n is an array of n symbols in which each symbol occurs exactly once in each row and exactly once in each column. -
articleAn introduction to magic squares
Find out about Magic Squares in this article written for students. Why are they magic?! -
articleLearning mathematics through games series: 4. From strategy games
Basic strategy games are particularly suitable as starting points for investigations. Players instinctively try to discover a winning strategy, and usually the best way to do this is to analyse the outcomes of series of 'moves'. With a little encouragement from the teacher, a mathematical investigation is born.
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articleGames related to Nim
This article for teachers describes several games, found on the site, all of which have a related structure that can be used to develop the skills of strategic planning.
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articleThe naked pair in Sudoku
A particular technique for solving Sudoku puzzles, known as "naked pair", is explained in this easy-to-read article.
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articleCorresponding Sudokus
This second Sudoku article discusses "Corresponding Sudokus" which are pairs of Sudokus with terms that can be matched using a substitution rule.
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articleMaths 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. -
pageMaking maths: double-sided magic square
Make your own double-sided magic square. But can you complete both sides once you've made the pieces?
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pageProblem solving, using and applying and functional mathematics
Problem solving is at the heart of the NRICH site. All the problems give learners opportunities to learn, develop or use mathematical concepts and skills. Read here for more information.