I got tired of solving these problems. So, I just wrote a solution that works for everything.
Sums with Excluded Digits
Check if sorted
given 3 sides, find area of this triangle
Determine the number of odd integers in a vector
Extra safe primes
Divisible by n, prime divisors (including powers)
Combined Ages 3 - Non-symmetric, n ≥ 3
Divisible by n, prime vs. composite divisors
Divisible by 15
Approximation of Pi (vector inputs)
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