GMATPrep,number property,pls,help

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tanviet: Legendary Member; Posts: 1404; Joined: Tue May 20, 2008 6:55 pm; Thanked: 18 times; Followed by:2 members

GMATPrep,number property,pls,help

by tanviet » Wed Dec 23, 2009 6:23 pm

This question from GMATPrep,pls help

for every positive even integer n, f(n) is defined to be product of all even integer from 2 to n, inclusive. P is smallest prime factor of h(100) +1. P is

a,between 2 and 10

b,between 10 and 20

c,between 20 and 30

d,between 30 and 40

e,more than 40

Quote

Source: Beat The GMAT — Problem Solving | Wed Dec 23, 2009 6:23 pm

Stuart@KaplanGMAT: GMAT Instructor; Posts: 3225; Joined: Tue Jan 08, 2008 2:40 pm; Location: Toronto; Thanked: 1710 times; Followed by:614 members; GMAT Score:800

by Stuart@KaplanGMAT » Wed Dec 23, 2009 6:36 pm

duongthang wrote:This question from GMATPrep,pls help

for every positive even integer n, f(n) is defined to be product of all even integer from 2 to n, inclusive. P is smallest prime factor of h(100) +1. P is

a,between 2 and 10

b,between 10 and 20

c,between 20 and 30

d,between 30 and 40

e,more than 40

I believe this question has been posted h(100) + 1 times!

Remember, you can use the search function to see if a question has already been addressed.

For example, I did a search on h(100) and got 4 pages of hits, including:

https://www.beatthegmat.com/gmat-prep-nu ... t8649.html

and

https://www.beatthegmat.com/gmat-prep-stumper-t4092.html

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course

Quote

maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 am; Thanked: 82 times; Followed by:9 members; GMAT Score:720

by maihuna » Fri Dec 25, 2009 5:46 am

Stuart Kovinsky wrote:
duongthang wrote:This question from GMATPrep,pls help

for every positive even integer n, f(n) is defined to be product of all even integer from 2 to n, inclusive. P is smallest prime factor of h(100) +1. P is

a,between 2 and 10
b,between 10 and 20
c,between 20 and 30
d,between 30 and 40
e,more than 40
I believe this question has been posted h(100) + 1 times!

Remember, you can use the search function to see if a question has already been addressed.

For example, I did a search on h(100) and got 4 pages of hits, including:

https://www.beatthegmat.com/gmat-prep-nu ... t8649.html

and

https://www.beatthegmat.com/gmat-prep-stumper-t4092.html

You are right Stuart, this Q is so infamous, actually in one of the runs(I think gmatprep is not trully random, just have 2-3 seeds, more or less for a given performance the order is same) it is 3rd question, and most of the people get stuck and just looks for internet to type this Q out.