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).
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Sum of first n positive integers
Reverse a matrix
MATLAB Basic: rounding III
Generalised Hamming Number
Two functions (to be sure)
Narcissistic number ?
Numbers spiral diagonals (Part 1)
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