Find the next number. (trick question :P) (in Contests)


Phoenix [The Forgehood] December 22 2007 10:57 AM EST

This is the sequence: 3,6,9,12,15,__

What's the next number? This is a trick question, so please do not say 18.

If you think of a number, please say the sequence you used.

For example, if you thought it was 18, say the sequence is 3(n) where n is the # term of the sequence.

There are an infinite amount of answers. (I'm not joking.)

Winner gets 100K. Or whoever gives the most satisfactory answer..

AdminNightStrike December 22 2007 11:06 AM EST

18!

(heh.. j/k)

Mikel December 22 2007 11:08 AM EST

I'll go with 30, since you said 18 is incorrect.
I'm a going by the fact that you listed out a sequence and the next step would be to add 15 to the sequence of numbers.

AdminShade December 22 2007 11:09 AM EST

x = 3n in which x is your answer and n is a whole number to give your answers.

Trick question? Indeed because you gave the answer yourself already :p

Admin{CB1}Slayer333 December 22 2007 11:12 AM EST

((((9956512 - 9956496) * 3) - 3) / 3)

toitle December 22 2007 11:16 AM EST

18...the sum of the digits can be reduced to a cycling pattern of 3, 6, 9. 18(1+8=90, 21(2+1=3), 24(2+4=6), etc...

toitle December 22 2007 11:17 AM EST

or alternatively...42, the answer is 42

[P]Mitt December 22 2007 11:20 AM EST

The next number is pi.

Sequence is:
3(n) for n<5, where n is the # term of the sequence
0.523598776(n), where n>6

RichardRahl{Kill Gun} December 22 2007 11:33 AM EST

uhhh...89? (guess =D)

Yukk December 22 2007 12:17 PM EST

Well, I'd have to guess 123456789 since, if there's an infinite number of answers, then possibly, your sequence is just random numbers which appear to have some relationship to each other.

Windwalker December 22 2007 12:32 PM EST

21 ;)

Marlfox [Cult of the Valaraukar] December 22 2007 2:49 PM EST

&#960;=3.14159265358979323846264338327950288419716939937510.
I like pi.(e)

;)

Marlfox [Cult of the Valaraukar] December 22 2007 2:50 PM EST

Uh, just remove the &#960;=

Sorry! :)

Aargh [Closer to the Stars] December 22 2007 3:03 PM EST

I'm going to go with Yukk here. If there's an infinite amount of answers, every number must be an answer. So it doesn't matter what number you say.

Unappreciated Misnomer December 22 2007 3:12 PM EST

the answer hmmmm

3x6
3+15

or any other fathomed equation possible that will equal the next number.

use an algorithm would be best :P

Lochnivar December 22 2007 3:35 PM EST

I like toitle's theory on the total of the digits cycling (3, 6,9, 3, 6,....)
So I'll pick 9,000,000 or maybe 108 or 2070..

three4thsforsaken December 22 2007 4:20 PM EST

OH I see.

I really like that theory, it's very clever!

Thraklight Resonance December 22 2007 4:53 PM EST

37. They are lottery numbers.

Phoenix [The Forgehood] December 22 2007 9:33 PM EST

mikel, I never said that you add 15 for the next number of the sequence.

mitt, your sequence says >6, so I don't know what happens at 6, so.. sorry technical issue. just patch it up :)

I never said you couldn't use 3(n), so I guess I have to give shade 100K.. :(

I like toitle's answer, so he gets 100K too.

neither of these winning sequences will be accepted as a correct answer anymore. nor will sequences from these two winners. (gotta make this fair :P mwahahaha!)

you cannot use someone else's sequence (the first to post the sequence gets the credit) and PLEASE! make a sequence to go with your answer!

I'm still looking for a good sequence, so that 100K's still there.

Meteor Hawk (Tinred Iaeun) 141.155.11.57 toitle (Kree) $100000 9:25 PM EST

Meteor Hawk (Tinred Iaeun) 141.155.11.57 AdminShade (Children of Hurin) $100000 9:30 PM EST

I'll post the sequence when someone wins. :)

Phoenix [The Forgehood] December 22 2007 9:33 PM EST

oh, and it's not the lottery numbers.

j'bob December 22 2007 9:54 PM EST

27
3 (+) 6 (=) 9 / 12 (+) 15 (=) 27

i don't have anything further cause the post doesn't say it has to continue past "the next number".
Just a bit of fun. I'm not much on math.

[P]Mitt December 22 2007 9:58 PM EST

/me patches....

The next number is pi.

Sequence is:
3(n) for n<6, where n is the # term of the sequence
0.523598776(n), where n > or = to 6

:)

Ulord[NK] December 22 2007 10:05 PM EST

Let n be the index of the numbers in the sequence.
Let An be the nth number in the sequence.
A1 = 3
A2 = 6
A3 = 9
For An with 6>= n > 3,

An = a*10+b such that a + b = A(n - 3)

A4 = 12, a = 1, b = 2, a+b = 3 = A1
A5 = 15, a = 1, b = 5, a+b = 6 = A2
A6 = 36, a = 3, b = 6, a+b = 9 = A3

Therefore, the 6th number in the sequence is 36.

Finite sequence counts right? :)

AdminNightStrike December 22 2007 10:15 PM EST

S(k) = k(n-1) + 3

AdminNightStrike December 22 2007 10:23 PM EST

S(k[n]) = k[n-1] + k[1]

AdminNightStrike December 22 2007 10:39 PM EST

Ok, this is a great one, but requires two control variables that are very hard to write out in this forum with no MathType support.

m=-2
n=1
S(k) = n*n - n*m

That's an awesome one...... Works real well, too:

k[1] = 1*1 - 1*-2 = 3
k[2] = 2*2 - 2*-1 = 6
k[3] = 3*3 - 3*0 = 9
k[4] = 4*4 - 4*1 = 12
k[5] = 5*5 - 5*2 = 15
k[6] = 6*6 - 6*3 = 18
k[7] = 7*7 - 7*4 = 21

etc.

AdminNightStrike December 22 2007 10:41 PM EST

btw, that does reduce to:

S(k) = n*n - n*m
S(k) = n ( n - m )

Since n - m is always 3, then it's S(k) = n * 3, or 3n.....

But still... it's cool.

toitle December 22 2007 10:52 PM EST

Since I can't win again I have to ruin it for everyone now. The answer is, there is no next number. That is as high as I can count while standing. Think about it a sec, you'll figure it out :)

AdminNightStrike December 23 2007 1:04 AM EST

What, you can't bend down?

AdminNightStrike December 23 2007 1:09 AM EST

S(k) = 3 (5 - n % 5)

Cyclical! The next number is 3!

(% is mod... so (5 - n mod 5))

AdminNightStrike December 23 2007 1:19 AM EST

Wait.. I think there's a typo...

S(k) = n % 5 * 3 + 3, n is 0-based. If n is 1-based, make it (n - 1) instead of (n).

Wizard'sFirstRule December 23 2007 1:25 AM EST

first: even if there is an infinite answers, not necessary for every number to be an answer. e.g. if all multiple of 2s are answers, that would still be infinite.

my answer would be 24. that sequence is actually 2 sequences.
T(2n)=T(2n-2)*2
and T(2n-1)=T(2n-3)+6
where n is any natural number (exclude 0)

Elf X.7plus35k December 23 2007 1:56 AM EST


Flexible Mbps increments: 3, 6, 9, 12, 15, 21, 27, 36

Armageddon December 23 2007 2:41 AM EST

The one true solution is the segmented line. . .

y=3x; y=integer; x=number position in sequence

Y-Intercept = 0
X-Intercept = 0
Origin of (0,0)

{cb1}Linguala December 23 2007 4:05 AM EST

it's 1008
We"re going back in time :-)
Or if you prefer the present, it's 2007
mind the numbers are dividable by 3 and 9
You can add an infinite amount of 0's and 3's, 6's and 9's to any part of a number that's dividable by 3 and it'll stay dividable by 3.
With 9, same goes for 0 and 9.
Or any multiples will do the trick too, so the next number is our fair year of 2007 which is about to make way for another long year(1 extra day in 2008)

Phoenix [The Forgehood] December 23 2007 11:16 AM EST

I'll have to say... Mitt wins.. sorry, all.

Now for round 2!

the sequence is now 3,6,9,12,15,7218,__

What is the next number?

For this round, I'm only accepting the answer I'm thinking of.

As a hint, the number is between 40,000 and 50,000.

winner gets 200K. (Let's see who's clairvoyant, shall we?)

Meteor Hawk (Tinred Iaeun) 70.18.34.169 Mitt (Mittar) $100000 11:16 AM EST

drudge December 23 2007 1:36 PM EST

all yall are ridiculas; nothing in this post made sense at all except the words on the page. ur all insane

Wizard'sFirstRule December 23 2007 6:14 PM EST

yup. CB leads to insanity. We have proven it. It is the purpose of this exercise anyway, right?

Phoenix [The Forgehood] December 23 2007 8:44 PM EST

The first part: To see if people can follow directions AND think at the same time

The second part: to see if anyone's clairvoyant.

:P

toitle December 23 2007 8:54 PM EST

I'll take a stab...42021. the last 2 digits follow what appeared to be the original pattern of 3n, with the entire number divisible by 3n

Phoenix [The Forgehood] December 24 2007 11:49 AM EST

very close. it's between 43K and 44K

QBOddBird December 24 2007 11:54 AM EST

Screw random numbers and clairvoyancy.

The answer is obviously a foot and a half.

Phoenix [The Forgehood] December 24 2007 11:55 AM EST

You know, I'm surprised noone has typed out all the numbers between 43K and 44K...

Marlfox [Cult of the Valaraukar] December 24 2007 2:16 PM EST

42k

Main Beach Crew December 24 2007 2:51 PM EST

I dont have time to write out 1000 numbers so ill guess 2.

43,021

43,420

Wizard'sFirstRule December 24 2007 3:00 PM EST

43121 really, nothing more than random guesses. Does writing a program that prints all number between 43k and 44k counts? It will be in QB (Quick Basic)

Fembley [Water Warriors] December 24 2007 3:07 PM EST

43001,43002,43003,43004,43005,43006,43007,43008,43009,43010,43011,43012,43013,43014,43015,43016,43017,43018,43019,43020,43021,43022,43023,43024,43025,43026,43027,43028,43029,43030,43031,43032,43033,43034,43035,43036,43037,43038,43039,43040,43041,43042,43043,43044,43045,43046,43047,43048,43049,43050,43051,43052,43053,43054,43055,43056,43057,43058,43059,43060,43061, 43062, 43063,43064,43065,43066,43067,43068,43069,43070,43071,43072,43073,43074,43075,43076,43077,43078,43079,43080,43081,43082,43083,43084,43085,43086,43087,43088,43089,43090,43091,43092,43093,43094,43095,43096,43097,43098,43099,43100

Fembley [Water Warriors] December 24 2007 3:13 PM EST

43101,43102,43103,43104,43105,43106,43107,43108,43109,43110,43111,43112,43113,43114,43115,43116,430
117,43118,43119,43120,43121,43122,43123,43124,43125,43126,43127,43128,43129,43130,43131,43132,43133,43134,43135,43136,43137,43138,43139,43140,43141,43142,43143,43144,43145,43146,43147,43148,43149,43150,43151,43152,43153,43154,43155,43156,43157,43158,43159,43160,43161, 43162, 43163,43164,43165,43166,43167,43168,43169,43170,43171,43172,43173,43174,43175,43176,43177,43178,43179,43180,43181,43182,43183,43184,43185,43186,43187,43188,43189,43190,43191,43192,43193,43194,43195,43196,43197,43198,43199,43200

Jamba in da Juice December 24 2007 3:27 PM EST

43001,
43002,
43003,
43004,
43005,
43006,
43007,
43008,
43009,
43010,
43011,
43012,
43013,
43014,
43015,
43016,
43017,
43018,
43019,
43020,
43021,
43022,
43023,
43024,
43025,
43026,
43027,
43028,
43029,
43030,
43031,
43032,
43033,
43034,
43035,
43036,
43037,
43038,
43039,
43040,
43041,
43042,
43043,
43044,
43045,
43046,
43047,
43048,
43049
,43050,
43051,
43052,
43053,
43054,
43055,
43056,
43057,
43058,
43059,
43060,
43061,
43062,
43063,
43064,
43065,
43066,
43067,
43068,
43069,
43070,
43071,
43072,
43073,
43074,
43075,
43076,
43077,
43078,
43079,
43080,
43081,
43082,
43083,
43084,
43085,
43086,
43087,
43088,
43089,
43090,
43091,
43092,
43093,
43094,
43095,
43096,
43097,
43098,
43099,
43100,
43101,
43102,
43103,
43104,
43105,
43106,
43107,
43108,
43109,
43110,
43111,
43112,
43113,
43114,
43115,
43116,
43116,
43117,
43118,
43119,
43120,
43121,
43122,
43123,
43124,
43125,
43126
43127
43128
43129
43130
43131
43132
43133
43134
43135
43136
43137
43138
43139
43140
43141
43142
43143
43144
43145
43146
43147
43148
43149
43150
43151
43152
43153
43154
43155
43156
43157
43158
43159
43160
43161
43162
43163
43164
43165
43166
43167
43168
43169
43170
43171
43172
43173
43174
43175
43176
43177
43178
43179
43180
43181
43182
43183
43184
43185
43186
43187
43188
43189
43190
43191
43192
43193
43194
43195
43196
43197
43198
43199
43200

Phoenix [The Forgehood] December 24 2007 3:29 PM EST

how about this... next person to post gets 50K and that's the end of the post?

yeah... not at all time-consuming... someone wins something..

I like the idea.

All right. Next person to post wins.

Fembley [Water Warriors] December 24 2007 3:29 PM EST

And for a REAL answer, I'd say..43,263

AM I RIGHT? :PO

toitle December 24 2007 3:30 PM EST

43221

Jamba in da Juice December 24 2007 3:35 PM EST

43200
43201
43202
43203
43204
43205
43206
43207
43208
43209
43210
43211
43212
43213
43214
43215
43216
43217
43218
43219
43220
43221
43222
43223
43224
43225
43226
43227
43228
43229
43230
43231
43232
43233
43234
43235
43236
43237
43238
43239
43240
43241
43242
43243
43244
43245
43246
43247
43248
43249
43250
43251
43252
43253
43254
43255
43256
43257
43258
43259
43260
43261
43262
43263
43264
43265
43266
43267
43268
43269
43270
43271
43272
43273
43274
43275
43276
43277
43278
43279
43280
43281
43282
43283
43284
43285
43286
43286
43287
43288
43289
43290
43291
43292
43293
43294
43295
43296
43297
43298
43299
43300

Jamba in da Juice December 24 2007 3:36 PM EST

dang it, i was still typing when u posted

Phoenix [The Forgehood] December 27 2007 9:16 PM EST

well.. I did say the next person to post would win.. so..

Meteor Hawk (Tinred Iaeun) 141.155.15.186 Fembley (Skyson) $50000 9:16 PM EST
This thread is closed to new posts. However, you are welcome to reference it from a new thread; link this with the html <a href="/bboard/q-and-a-fetch-msg.tcl?msg_id=002J77">Find the next number. (trick question :P)</a>