Be careful, I've implemented the sieve, but not all versions of it are sufficiently fast to handle the biggest numbers in the test suite.
This doesn't use primes(x),but still feels a little like cheating.
The whole point of using the sieve is not knowing which numbers are prime. So it is no different than sum(primes).
Find state names that end with the letter A
Prime factor digits
Return unique values without sorting
Is it an Armstrong number?
05 - Vector Equations 3
Clear all empty variables from the workspace
Find files with extension ext in the current directory
Find my secret number
Numbers spiral diagonals (Part 1)
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