Return double factorial
n(n-2)...(5)(3)(1), n>0, odd
n!! = n(n-2)...(6)(4)(2), n>0, even
1 , n = -1, or n = 0
6!! = (6)(4)(2) = 48
Neither n = -1, nor n = 0 are tested.
Remove the small words from a list of words.
Find the logic
Side of an equilateral triangle
Is this triangle right-angled?
Rounding off numbers to n decimals
Van Eck's Sequence's nth member
Pi Digit Probability
Basic Monte Carlo Simulation
Bridge and Torch Problem - Probability
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