Comments on: Regifting Robin Mind Trick

By: =]

=] — Mon, 10 May 2010 19:34:24 +0000

All of you are wrong , there is no mathematical formula . . . . Regifting Robin is a magic psychic lady.

By: Manny

Manny — Mon, 26 Apr 2010 14:53:46 +0000

Have noticed if u dont even try the number will be 99

By: Dejan

Dejan — Sat, 20 Feb 2010 22:57:07 +0000

Hehehehehe, this was the first C program I did all by myself years ago. :D

By: Ayush

Ayush — Fri, 12 Feb 2010 17:51:45 +0000

@kiki
you dont need to understand the equations…
see to crack it… dont do the maths…just start and look for all multiples of 9,
they have the same gifts…..and you will get dat answer only…
to understand it better choose the same no. they just change the gifts…

By: Kiki

Kiki — Sun, 31 Jan 2010 03:18:49 +0000

I still dont understand anything!!!! How could anyone understand those hard math equations!!!!! Oh well this trick is fun anyway

By: canyn

canyn — Fri, 29 Jan 2010 23:06:10 +0000

‘The units digit kind does cloud the issue’

Apologies. That should read:

The units digit kind’a does cloud the issue…’

By: canyn

canyn — Fri, 29 Jan 2010 23:03:26 +0000

There’s more than one way to skin a cat….

I MAY have missed this in the posts above, but I have yet to see the puzzle explained like this:

FORGET the units digit (the digit on the right in the 10º place). It has no effect on the outcome because according the ‘the rules’ you subtract it…it’s taken off the total, so it’s extraneous info thrown in to confuse.

What you end up with, then, is ALWAYS a single-digit number x 10:

10
20
30
40
.
.
90

ANY time you subtract the multiple of 10 FROM that number, the result is a multiple of 9.

40-4=36 ..a multiple of 9
50-5=45 ..a multiple of 9

WHY a multiple of 9? Because you are subtracting ‘1′ from every ‘ten’!

40 is four tens. When you subtract ‘4′ from that number..you are subtracting ONE from every TEN.

…it’s always going to be a multiple of 9.

It’s not hard to understand why 10 – 1 = 9, right? That’s exactly what you’re doing when you follow ‘the rules’ of this game.

The units digit kind does cloud the issue..and it’s useless, has no impact on the puzzle.

Ha! I did wonder at first how come my PC firewall was letting my mouse co-ordinates out.

Neat!

By: Rolling Eyes

Rolling Eyes — Wed, 20 Jan 2010 00:02:13 +0000

Nikky, every multiple of nine is the same gift. Go read the comments, and pay attention this time. Then go play the game, and be mindful there also.

By: NIkky

NIkky — Sun, 17 Jan 2010 01:27:40 +0000

even if its a multiple of nine she still has to know the one i picked out of all them. so it still doesnt make sense.

By: william young

william young — Fri, 15 Jan 2010 02:50:03 +0000

this silly trick is a multiple of nine