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The number which best completes the sequence below is 2 9 5 13 10 19 17 ?

<< < (3/4) > >>

fohfoh:

--- Quote from: muesli on January 29, 2010, 08:30:49 AM ---
--- Quote from: Jesta23 on January 29, 2010, 07:47:53 AM ---ok mammasauce, Ill give you a pattern, you give me the answer.


1 9 3 8 16 4 9

Im feeling nice so I came up with a second one as well.

2 6 42 1806 3263442


--- End quote ---

am i allowed to say the answer..? :)

--- End quote ---

Just put it in spoilers

Jesta23:

--- Quote from: muesli on January 29, 2010, 08:30:49 AM ---am i allowed to say the answer..? :)

--- End quote ---
The second one is probably to easy, but i thought the first one would take some time to figure out. If you got them, then im guessing he does aswell.

muesli:
1 9 3 8 16 4 9
(click to show/hide)17
the pattern is +8 root +5
1+8=9

3+5=8
8+8=16

4+5=9
9+8=172 6 42 1806 3263442
(click to show/hide)1,06501E+13
pattern: current number + current number squared






lol i guess i put too much effort in it..

fohfoh:
What the hell is wrong with your font? It goes like... all 1980s on you when you open the spoiler.

muesli:

--- Quote from: fohfoh on January 29, 2010, 09:05:39 AM ---What the hell is wrong with your font? It goes like... all 1980s on you when you open the spoiler.

--- End quote ---
if you mean the first spoiler.. idk what's wrong with the font there.

i just used mimetex in both spoilers.. (click to show/hide)with that you can graphically represent your formulas. for example it would be really hard to write that..
(please just click to see the image)       
in normal text.
edit: idk what's wrong.. the image tag automatically inserts width and height with wrong values :(

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