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).
Largest Twin Primes
kmph to mps
Perfect Square or not
Area of a triangle
Permute diagonal and antidiagonal
Rank of magic square (for beginners)
I want to know everything!
How many monitors are connected ?
Pandigital number n°2 (Inspired by Project Euler 32)
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