for your brains

Subject: for your brains Sat Jan 24, 2009 12:12 pm

Just going through some pysologic exams again. They wanna know my best and worst sides :-) So I got inspired to start this new topic here:

Rules: If you find the solution of that line you can start a new one!

What`s the next number (+ explain how you found it)? An easy one to start with.

1, 2, 6, 42, 1806, ???

Subject: Re: for your brains Sat Jan 24, 2009 1:41 pm

1,
1(2) = 2,
2(3) = 6,
6(7) = 42,
42(43) = 1806,
1806(1807) = 3263442,

(n) being the next digit up, i surrender my problem to someone else i just felt like solving

Subject: Re: for your brains Sat Jan 24, 2009 1:49 pm

Took me about a minute. Guess I should stop trying to discover complex relationships in everything...

solution: 3263442
explanation: an+1 = an * (an + 1)

Mine is:

1 2 6 48 2592 ???

Subject: Re: for your brains Sat Jan 24, 2009 1:50 pm

err damn too late, how comes the forum system didn't tell me anything?

Subject: Re: for your brains Sat Jan 24, 2009 1:51 pm

n(i+1) = n(i) * (n(i)+1)

^^

Subject: Re: for your brains Sun Jan 25, 2009 4:42 am

wow..

thats math.....

difficult math....

not for my brain....

Subject: Re: for your brains Mon Jan 26, 2009 11:00 am

Major Zeman wrote:: 1 2 6 48 2592 ???

Noone, means I have to think????

Subject: Re: for your brains Mon Jan 26, 2009 12:24 pm

n_{i + 1} = (n_i + n_i-1) * n_i

Subject: Re: for your brains Mon Jan 26, 2009 12:37 pm

correct

Subject: Re: for your brains Mon Jan 26, 2009 7:17 pm

new set?

Subject: Re: for your brains Mon Jan 26, 2009 10:53 pm

try this 1

1 1 1 = 8
2 2 2 = 8
3 3 3 = 8
4 4 4 = 8
5 5 5 = 8
6 6 6 = 8
7 7 7 = 8
8 8 8 = 8
9 9 9 = 8

you have to find out how all those get 8.

easiest i do as example:

8+8-8=8

you can add all mathematic symbols, but no new numbers.

hint:
( ) also is allowed