For the mathematically curious there are many fascinating and unusual theorems and formulas that are seldom included in text-books. Your very best students would appreciate access to problems pertaining to these: the Four Color theorem, De Gua's theorem, Monge's theorem, Midy's theorem, Pappus's theorems, Brun's theorem, etc. Altogether, over 30 theorems and formulas are included with problems of varying difficulty levels.
The worksheets are broken up into 5 categories: prime numbers, number theory, circles, triangles, polygons & planes.
193 PROBLEMS ALTOGETHER!
[The problems in All WORKSHEETS and PREVIEWS are printed in difficulty (1 [easy], 2 [not so easy], 3 [proficiency] up to 4 [mastery]) order within a skill. The actual difficulty level appears slightly to the left of the DK box of each problem in a very small font. Also, instructional references appear on worksheets but are optional on quizzes.]
You might also want to check out the Grade 8 Summary
which has links to many related offerings here.
In addition, the following are 2 other unusual units and question sets for more advanced classes: the Grade 8 (and up) UNIT: Square Root Approximations
and Grade 8 Historical problems