gmat prep q

[smallsorrow]

For every pos. integer n, the function h(n) is deifined to be the product of all even int´s from 2 to n, incl.. if p is the smallest prime factor of h(100)+1, then p is:
1. between 2 and 10
2. between 10 and 20
3, between 20 and 30
4. between 30 and 40
5. greater than 40

oa follows

[Ian Stewart]

Probably the most asked problem on this forum. I posted a solution here:

www.beatthegmat.com/gmat-prep-q-t14339.html

but there are many others around- search for "h(n)" to find other explanations.

[smallsorrow]

Thank you... it´s a real mean problem... !!