Sum all integers from 1 to 2^n
Triangle Numbers Below N
Can the given sides form a triangle?
Draw a 'X'!
Summing Rows and Columns
Determine digits of the Copeland-Erdos constant
Count numbers whose reciprocals' decimal expansions terminate
Convert a number from base 10 to factorial notation
Solve an ODE: equation for a 2D laminar jet
Find jumping medalists
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