Working systematically

There are 604 NRICH Mathematical resources connected to Working systematically
Maths Trails
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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.
Integrated sums sudoku
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Integrated sums sudoku

The puzzle can be solved with the help of small clue-numbers which are either placed on the border lines between selected pairs of neighbouring squares of the grid or placed after slash marks on the intersections between two diagonally adjacent squares.
Introducing NRICH TWILGO
interactivity

Introducing nrich twilgo

We're excited about this new program for drawing beautiful mathematical designs. Can you work out how we made our first few pictures and, even better, share your most elegant solutions with us?
Impuzzable
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Impuzzable

This is about a fiendishly difficult jigsaw and how to solve it using a computer program.
Latin Squares
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Latin 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.
Learning Mathematics Through Games Series: 4. From Strategy Games
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Learning 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.