'Hole Numbers' and Other Practical Investigations

This is a new book of investigations from the authors of New York Cop. These 28 new investigations are more practical and statistical in nature than the purer mathematical style of New York Cop. Also the style of presentation is different with each problem written as an open challenge. There are some suggestions and help provided as well as more structured questions, so that teachers can use the material in a flexible way to suit their particular pupils.