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ERIC Number: EJ891796
Record Type: Journal
Publication Date: 2010
Pages: 4
Abstractor: ERIC
Reference Count: N/A
ISSN: ISSN-0045-0685
Keypad Geometry and Divisibility of Numbers
Van Dyke, Frances; Keynes, Michael
Australian Mathematics Teacher, v66 n2 p26-29 2010
In this article, the authors show how students can form familiar geometric figures on the calculator keypad and generate numbers that are all divisible by a common number. Students are intrigued by the results and want to know "why it works". The activities can be presented and students given an extended amount of time to think about them. As students can easily generate their own examples, they can continue to hypothesise why the property holds as the semester moves on. The proofs of the more complicated figures should be given only to those who are truly interested.
Australian Association of Mathematics Teachers (AAMT). GPO Box 1729, Adelaide 5001, South Australia. Tel: +61-8-8363-0288; Fax: +61-8-8362-9288; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Australia