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 6 Probability that the second-best player finishes second in a single-elimination tournament, given that better players always defeat weaker players? 6 Can you answer my son's fourth-grade homework question: Which numbers are prime, have digits adding to ten and have a three in the tens place? 4 In a triangle, prove that $a\cos A+b\cos B+c\cos C=\frac{8\Delta^2}{abc}$ 4 3-dimensional light up cube, # of rows/cols/diags in/on a 4 × 4 × 4 cube 4 Ways to write “50”

### Reputation (2,022)

 +25 Generate a uniform distribution from n coin flips +10 Number of ways to write n as a sum of consecutive integers +2 Number of ways to write n as a sum of consecutive integers +10 Can you answer my son's fourth-grade homework question: Which numbers are prime, have digits adding to ten and have a three in the tens place?

### Questions (5)

 7 You are Johnny Depp 2! 3 Failure criteria for a collection of independent evolving discrete random variables 1 Absorbing state for a collection of random walks 1 You are Johnny Depp 3! 1 Probability distribution function of the length of an interval taken from a uniform probabilty distribution.

### Tags (82)

 82 probability × 137 8 probability-theory × 15 17 combinatorics × 18 7 calculus × 8 12 statistics × 24 7 dice × 6 12 recreational-mathematics × 10 6 elementary-number-theory × 3 9 probability-distributions × 18 6 trigonometry × 2

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