Kogorous Riddle Thread and eworms Deduction Thread

[sstimson]

Spoiler:

wake up

[eworm]

Spoiler:

Click the "Spoiler" button, then the box will open

[Silver1412]

I fight my way out with my karate ~nya!

[Kogorou]

Holy crap, Kogorou returns! Finally! Don't you feel ashamed, missing my best BFR yet?
And I can't wait for August

Spoiler:

The riddle's pretty vague. We can open the box from inside and get out. You didn't say it was locked or anything.

Gomen, gomen.
I'm really busy. And yeah I read it thru but my free time didn't allow me to solve it

And Kid Sherlock is the next first solver of my "riddle"

[kidSherlock]

Gomen, gomen.
I'm really busy. And yeah I read it thru but my free time didn't allow me to solve it

And Kid Sherlock is the next first solver of my "riddle"

So is it my turn?

if it is my turn then

find the next number in this series

  1 8 10 19

[VQ]

So is it my turn?

if it is my turn then

find the next number in this series

1 8 10 19

I think i'm wrong but:

Spoiler:

30?
1+1+8=10
10+8+1=19
19+10+1=30

[kidSherlock]

@VQ. its wrong
try and think of another way of solving it

[sstimson]

So is it my turn?

if it is my turn then

find the next number in this series

   1 8 10 19

ok crazy thought time

Spoiler:

it looks like two sets of sequences

First ( odd ) is like this maybe 1 10 100 1000 or add a zero to the last one
second (even) look to be like this 8 add a 10 then N+1 - 8, 19, (19+10+1)=30

of course there is another way to look at it
1+8+1=10, 8+10+1=19, 10+19+1=30 but that one we know is wrong

[Kogorou]

That looks funny

[VQ]

@VQ. its wrong
try and think of another way of solving it

Then the solution is elementary:

Spoiler:

90

one, eight, ten, nineteen, ninety.

[eworm]

Spoiler:

Or nine, if we go with VQ's idea.

[kidSherlock]

@VQ. its wrong
try and think of another way of solving it

Then the solution is elementary:

Spoiler:

90

one, eight, ten, nineteen, ninety.

right^^ IT's your turn

Spoiler:

Or nine, if we go with VQ's idea.

it can be that but it needs to be ascending. 1 8 10 19 90

[eworm]

Spoiler:

Or nine, if we go with VQ's idea.

it can be that but it needs to be ascending. 1 8 10 19 90

Well, I guess... But in that case there can't be any more numbers in the sequence, right?

Okay, VQ time!
.
.
.
Again...

[kidSherlock]

Spoiler:

Or nine, if we go with VQ's idea.

it can be that but it needs to be ascending. 1 8 10 19 90

Well, I guess... But in that case there can't be any more numbers in the sequence, right?

yes, actually i was going to put that as a hint but VQ already answered it so no need to.

[VQ]

My turn again:

Spoiler:

A + C = D
A·B = C
C - B = B
A·4 = D

Find the numeric values of the letters and give your reasoning.