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        riddles >> easy >> Number me this
        
(Message started by: alien2 on May 3^rd, 2019, 6:42am)

Title: Number me this
Post by alien2 on May 3^rd, 2019, 6:42am

1.

a) 27438197
b) 14651827

What number comes after 7?

2.

104857963
263458790
126457809

I am looking for a 3-digit number.

Title: Re: Number me this
Post by rmsgrey on May 3^rd, 2019, 7:57am

on 05/03/19 at 06:42:01, alien2 wrote:

2.

104857963
263458790
126457809

I am looking for a 3-digit number.

Obvious guess: [hide]213[/hide]

It's not 100% satisfying because it doesn't account for all features of the question, but it derives from a feature that's unlikely to arise by chance, so, if it's not the intended answer, then it's probably related in some way.

Title: Re: Number me this
Post by alien2 on May 4^th, 2019, 8:05pm

Your guess is the intended answer.

Any ideas for the 1st riddle, where both answers are not obvious, even though advanced math is not an issue at all?

Sorry because the answer wasn't entirely satisfying. "I can't get no satisfaction . . ." - Mick Jagger.

Title: Re: Number me this
Post by Grimbal on May 6^th, 2019, 12:48pm

on 05/03/19 at 06:42:01, alien2 wrote:

What number comes after 7?

8 :P

Title: Re: Number me this
Post by alien2 on May 8^th, 2019, 8:27am

on 05/06/19 at 12:48:05, Grimbal wrote:

8 :P

Your witty guess is actually the correct answer for b). Any ideas for a)?

Title: Re: Number me this
Post by Grimbal on May 10^th, 2019, 1:02pm

Good. I was afraid Peano's axioms would count as too advanced math.

for a) the correct answer is 2
the correct question is actually a) 29438167

Title: Re: Number me this
Post by alien2 on May 11^th, 2019, 11:59am

I myself was thinking 4. After the "first" 7 comes 4 and after the "second" 7 comes nothing. Silly, isn't it?