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Dec
24
asked
2 slightly different situations in which 2 coins are tossed. Does the knowledge of an observer effect the probabilities of the outcomes?
Dec
21
asked
In a family with two children, what are the chances, if one of the children is a girl, that both children are girls?
Dec
16
asked
Sum of 1/n*n for n = 1 ,2 ,3, …?
Nov
30
asked
Is Knopp's “Theory and Application of Infinite Series” out of date?
Nov
29
asked
What is limit of $\sum \limits_{n=0}^{\infty}\frac{1}{(2n)!} $?
Nov
20
asked
Let $(n, m)$, $n < m$ be an Amicable Pair. Looking for large sets of integers that cannot be $n$.
Nov
15
asked
True?: Let $(n, m)$ be an arbitrary Amicable Pair. Then $n$ is odd iff its last digit is $5$
Nov
13
asked
Amicable Pair $(a, b)$: given $a$, what are limits on size of $b$?
Nov
9
asked
Amicable pairs: any use for them yet?
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