Apparently, this user prefers to keep an air of mystery about them.
43 In a family with two children, what are the chances, if one of the children is a girl, that both children are girls? Dec 21 '10
4 2 slightly different situations in which 2 coins are tossed. Does the knowledge of an observer effect the probabilities of the outcomes? Dec 24 '10
4 Let $(n, m)$, $n < m$ be an Amicable Pair. Looking for large sets of integers that cannot be $n$. Nov 20 '10
3 True?: Let $(n, m)$ be an arbitrary Amicable Pair. Then $n$ is odd iff its last digit is $5$ Nov 15 '10
2 Amicable pairs: any use for them yet? Nov 9 '10