The comeback of brainteasers

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The comeback of brainteasers

Postby udosuk » Sun May 04, 2008 9:30 pm

Not sure if the folks here are ready for it, but anyway let's give it a try:

Brainteaser #1:

Why is 6842075193 a special number?

The correct answerer will get the right to post the next brainteaser, if he/she likes to.
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Postby tarek » Tue May 06, 2008 3:41 pm

At first glance, it has all the DECIMAL digits...Left even & Right odd.

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Postby JPF » Tue May 06, 2008 4:01 pm

It's almost what I found:(
In addition, I've noticed that :
7-5=2
5-1=4
1-9=-8
9-3=6
but so what:?:

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Postby tarek » Tue May 06, 2008 4:13 pm

JPF wrote:It's almost what I found:(
In addition, I've noticed that :
7-5=2
5-1=4
1-9=-8
9-3=6
but so what:?:


well isn't that the mirror image of what is on the left:?::idea:

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Postby Glyn » Tue May 06, 2008 5:02 pm

Well spotted Tarek, but it's off track I'm afraid.

75193 is interesting in a bizarre way, but that wasn't what Matt was after either.
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Postby udosuk » Tue May 06, 2008 5:29 pm

tarek wrote:... it has all the DECIMAL digits ...

This observation from tarek is relevant!:idea:

Triple click to see another minor hint I wrote:By reversing the number (3915702486), it is still special no less.

I'll post a major hint after the Cavs-Celtics NBA game later tonight! LBJ vs RA+PP+KG, I wonder who'll win?:)
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Postby tarek » Tue May 06, 2008 8:54 pm

"Decimal" made look for anothe base number to make some sense out of it (i.e. 6842075193 in x-decimal will turn out to be 9999999 or similar striking number).

but there are other interesting things that caught my eye.
start from ends & work inwards shifting from left to right...

3+6 =9
9-8= 1
1+4 =5
5+2 =7

but I guess it falls short of being a good answer:D

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Postby Glyn » Tue May 06, 2008 10:56 pm

Lots of weirdity here, most of it useless I guess.

From the front
3*6 mod 10=8
3*8 mod 10=4
3*4 mod 10 =2

From the back
3^2 mod 10=9
9^2 mod 10 =1

By the way 75193 is the largest number constructable from disjoint odd digits with disjoint differences between neighbouring and next-neighbouring digits.
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Postby udosuk » Wed May 07, 2008 6:35 am

Triple click to read the major hint I wrote:The other day I went to a town called Rebmun to visit my aunt Slaremun Cibara-Udnih & her husband Stigid Lamiced. Their 2 youngest kids, Net & Nevele came out to greet me. I asked them where were their elder brothers & sisters, and they told me they're lining up for a group photo.

Pretty ugly game tonight.:(
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Postby Glyn » Wed May 07, 2008 7:26 am

After seeing Matt's megaclue elsewhere here's a piece of info that might help without revealing as much.

In France 2678309541 would be considered special.
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Postby tarek » Wed May 07, 2008 8:59 am

does this special number correspond to a moment in time ?

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Postby Glyn » Wed May 07, 2008 9:19 am

Nothing to do with time

In Germany the special number is 8649702351. Funny how it changes in different countries.
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Postby udosuk » Wed May 07, 2008 9:22 am

Glyn wrote:In France 2678309541 would be considered special.

My French knowledge tells me it should be 2678350194.:?:

tarek wrote:does this special number correspond to a moment in time ?

Not really.
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Postby JPF » Wed May 07, 2008 9:34 am

something to do with the numbers written with letters :

zero, one, two, three, ...
zero, un, deux, trois, ...
zero, eins, zwei, drei, ...
:?:
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Postby Bigtone53 » Wed May 07, 2008 9:45 am

zero, one, two, three, ...
zero, un, deux, trois, ...
zero, eins, zwei, drei, ...


null in German, I think.
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