i once read it in an iq book and it mentioned it was one of the hardest numerical questions to figure out and that only about 10% of population can get it. i always wanted to see if that accurate.
here goes:
in the numerical sequence
8 5 4 9 1 6 3 2 0
going from left to right, explain the reason for the sequence.
{think outside the box}
first person with the correct answer gets two eprops...