01 May 2006
CuriousMath.com :: Math is an attitude
by 1 otherWant to learn how to quickly square a number that ends in 5? Or how to tell if a number is divisible by 3? Or maybe you'd like to know why the number 153 in the Bible is such an interesting number? That's the kind of fun and fascinating math tricks and trivia you'll find here at CuriousMath.com.
13 April 2006
Home Page for Calendar Reform
This
page is dedicated to the study of changes in the calendar.
Its aims are to promote thinking about future calendar reform;
to collect information on all aspects of historical reforms;
and to explore puzzles and paradoxes arising from transitions in time-keeping.
23 March 2006
1
(5 marks)
