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).
Return the 3n+1 sequence for n
Create a cell array out of a struct
Determine Whether an array is empty
Add more zeros
Can you beat the lottery again (for hardcore coder) ?
Rank of magic square (for beginners)
Clear all empty variables from the workspace
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