# Riddles and solution - The Lyorn's Den

## Wed Mar. 28th, 2007

### 02:45 pm - *Riddles and solution*

I posted some riddles at a blog, and have been asked for spoiler-less answers. So here's the riddles, the way I posted them. The answers are in the comments.

Not arithmetic at all:

20 1 18 4

M N B V ...

10 6 13 1 ...

1783 1848 1871 1947 ... (Only one number follows).

Double number sequence:

4 19 7 15 11 10 ...

Arithmetics on a hillside:

1 1 3 4 ...

0 2 2 2 ...

1 2 1 4 ...

lyorn## Solutions

(Link)The dart board: 20 1 18 4 13 6 10

The key board: M N B V C X Z (or Y)

The months of the year, first letter in numbers: 10 6 13 1 13 10 10

The French republics: 1783 1848 1871 1947 1958

Double number sequence:

4 19 7 15 11 10 16 4 22 -3

(that's

A: 4 [+3] 7 [+4] 11 [+5] 16 [+6] 22

B: 19 [-4] 15 [-5] 10 [-6] 4 [-7] -3

in a ABAB... pattern)

Arithmetics on a hillside:

1 1 3 4 3 6

0 2 2 2 5 32

1 2 1 4 8 5

(Thats three easy sequences,

A: 1 2 3 4 5 6 (+1)

B: 0 1 1 2 3 5 (add previous two)

C: 1 2 2 4 8 32 (multiply previous two)

arranged into a pattern:

C B A C B A

B A C B A C

A C B A C B

)

I hope I made no stupid error or typo.

(Anonymous)## Re: Solutions

(Link)This was my riddle, which does not utilize any arithmetic:

125 637 902 861 ...

(Anonymous)## Re: Solutions

(Link)125 : 0 circles

637 : 1 circle902: 2 circles861: 3 circlesSo, any answer such as "881" or "668" or "989" would work as the next item in the sequence.

(Anonymous)## Re: Solutions

(Link)Crazy insight problems. I could tell your french republic ones were years, and I guessed they were years for a series of events, but I didn't know what event. i guessed some countries wars. I wasn't so far off I suppose, especially given I was lacking the cultural knowledge of the years of the french republics.

I failed at your other ones because I didn't realize that you would alternate between two patterns in the same problem. Without that clue I could only establish that they seemed not to be following any one pattern. I intuited from there that the potential problem space I would have to shift through by trial and error would be so enormous I could stare at the problem for hours and never hit on the right answer, so I just gave up :)

lyorn## Re: Solutions

(Link)I wanted something with historical events, because that's a typical quiz (as opposed to puzzle) question.