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.
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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).
Remove any row in which a NaN appears
Replicate elements in vectors
Pi Estimate 1
Find the sides of an isosceles triangle when given its area and height from its base to apex
Pandigital number n°3 (Inspired by Project Euler 32)
Return a list sorted by number of consecutive occurrences
Two functions (to be sure)
Pandigital number n°2 (Inspired by Project Euler 32)
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