Test added to discourage lookup table solutions.
In the problem description, r1 and r2 appear to be upside down.
Corrected. Thanks, Tim.
Set the array elements whose value is 13 to 0
Integer or Float?
Find smallest number to leave a remainder of 1
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Find integer solutions to an equation with a sum of binomial coefficients
List Honaker primes
Determine aquifer properties: unsteady pump test in a confined aquifer
Solve an ODE: second-order linear equation with constant coefficients
Compute the sum of reciprocals of quadratics
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