What is the unique positive integer such that its digits add up to 9, and when we multiply by 9, the product’s digits add up to 9, and when we multiply by 9 again, the product’s digits still add up to 9? ]]>

when dividing by 9, the result’s digits are in ascending order? ]]>

In my blog I conducted a math game dedicated to the European Pi day (22th of July). The task is to take first n digits of pi, put math signs between them and get the value as close to pi as possible. Here it is: http://evolventa.blogspot.com/2015/07/priblizhenie-chsla-pi-pri-pomoshi-formul-so-skobkami.html

]]>To every gnome we assign colors he was standing on on different rounds. BBB would be a gnome who stood on a black color all three times.

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