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A Sudoku with clues given as sums of entries.
A particular technique for solving Sudoku puzzles, known as "naked pair", is explained in this easy-to-read article.
Solve this Sudoku puzzle whose clues are in the form of sums of the numbers which should appear in diagonal opposite cells.
Playing these games will help to test your understanding of different topics.
Games primary teachers
At the 2019 Hay Festival, Charlie Gilderdale and Alison Eves invited participants to work on a few of their favourite mathematical problems from the NRICH and RI Masterclasses collections.
Resources to accompany Charlie's NRICH workshop at NEU's Celebrating Education Conference.
An article for teachers based on a lecture and workshop activities at the NZAMT conference in New Zealand 2007
A page outlining the content of our 2019 day for teachers, focusing on resilience.
Jenny Piggott reflects on the event held to mark her retirement from the directorship of NRICH, but also on problem solving itself.
Can one example help us to perceive the generality?
Whether you are reflecting on the mathematical developments children have made over the year, or thinking about activities for a transition day this article offers plenty of ideas and tasks to. . . .