Riddle game

6/22/2013 7:57:10 PM
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Re: Riddle game

its 21 = U

AEIO.. U

6/22/2013 8:17:29 PM
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Total Posts 174

Re: Riddle game

my turn

Find the next number:

5 10 45 990 ?

6/23/2013 8:29:39 AM
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Total Posts 513

Re: Riddle game

489555

  • f(x) = x*(x-1)/2
  • f(5) = 10
  • f(10) = 45
  • f(45) = 990
6/23/2013 8:56:31 AM
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Total Posts 174

Re: Riddle game

right

(5*5-5)/2 = 10

(10*10-10)/2 = 45

(45*45-45)/2 = 990

(990*990-990)/2 = 489555

6/23/2013 9:16:31 AM
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Total Posts 513

Re: Riddle game

Yay. Finally, a riddle with real calculations and no pseudo numbers.

Find the next number:

1 1 2 7 18

6/24/2013 7:25:02 AM
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Re: Riddle game

Oh, was the riddle too hard?

Hint: It's related to Tetris.

6/24/2013 12:43:15 PM
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Re: Riddle game

may the sent lines of each combo?

6/24/2013 6:36:54 PM
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Total Posts 513

Re: Riddle game

No, lines sent by combos look different.

6/25/2013 7:08:56 AM
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Total Posts 513

Re: Riddle game

Hint 2: If you slightly change the rules of counting you get that row:

1 1 2 5 12        ( instead of 1 1 2 7 18 )

Probably you'll need the help of wikipedia or similar sites. It's hard to count it yourself.

6/25/2013 8:43:06 AM
t0x
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Re: Riddle game

this thread reminds me of how much i hate riddles