Check to see if a Sudoku Puzzle is Solved
Magic is simple (for beginners)
Fermat's Last Theorem - Fermat's conjecture
Area of an equilateral triangle
List the delete-a-digit primes
Find terms in the Connell sequence
List composite numbers that cannot be written as the sum of two primes
Solve an ODE: diffusion problem 2
Compute the Euler totient function
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