Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Today's Puzzle

17 May 2013   #21
mitchell65

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

Thank You Arc! You read the puzzle as I meant it to be read! I think it fair to say we are all right!
My System SpecsSystem Spec
17 May 2013   #22
Gary

Win 10 Pro 64
 
 

Quote   Quote: Originally Posted by Kari View Post
Quote   Quote: Originally Posted by mitchell65 View Post
There are three discs, Each on has a "7" on one side and an "8" on the other side. If thrown up radomly, how many combinations of numbers is possible. (Example "777" "888" etc)
2 * 2 * 2 = 8 combinations.
  • 777
  • 778
  • 787
  • 788
  • 877
  • 878
  • 887
  • 888
I think Kari is correct!
My System SpecsSystem Spec
17 May 2013   #23
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

My head hurts...

A Guy
My System SpecsSystem Spec
.

18 May 2013   #24
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Quote   Quote: Originally Posted by A Guy View Post
My head hurts...

A Guy

My System SpecsSystem Spec
18 May 2013   #25
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Badgers? We don't need no stinkin' badgers!!

A Guy
My System SpecsSystem Spec
18 May 2013   #26
mitchell65

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

My apologies for this thread! I started it off thinking it would be a bit of fun but it got taken far more seriously than I intended, so no more Puzzles from me!
My System SpecsSystem Spec
18 May 2013   #27
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Quote   Quote: Originally Posted by mitchell65 View Post
My apologies for this thread! I started it off thinking it would be a bit of fun but it got taken far more seriously than I intended, so no more Puzzles from me!
Nah, it's all good, post another, look at the fun everyone had

A Guy
My System SpecsSystem Spec
18 May 2013   #28
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Quote   Quote: Originally Posted by A Guy View Post
Badgers? We don't need no stinkin' badgers!!

A Guy
You have badges, now you dont want badger ..... how can I manage a badgest for you
My System SpecsSystem Spec
18 May 2013   #29
tom982

Microsoft Community Contributor Award Recipient

Windows 8.1 Pro x64
 
 

Quote   Quote: Originally Posted by Golden View Post
Quote   Quote: Originally Posted by Kari View Post
Quote   Quote: Originally Posted by mitchell65 View Post
There are three discs, Each on has a "7" on one side and an "8" on the other side. If thrown up radomly, how many combinations of numbers is possible. (Example "777" "888" etc)
If asked like this, then [Disk 1:7, Disk 2:7, Disk 3:8] is not the same combination than [Disk 1:7, Disk 2:8, Disk 3:7]. The answer is 8 combinations.
Kari is correct - in statistical theory combinations refers to permutations. Two different numbers on each of 3 disks is expressed as 2!3 (two factorial 3) which is 2 x 2 = 4 x 2 = 8.

The total number of combinations is 8.
2!3 isn't mathematically correct and would imply 2!*3, which is in fact 6. I think you mean 2^3, which is how you would calculate the number of outcomes and is 8

Some of you may have seen this before but I'll share it anyway because I think the maths behind it is fascinating. Given a set of n randomly chosen people, how large does n have to be before the probability of two people sharing a birthday becomes 0.5?

It's a well known maths problem so googling it will give you the answer in seconds, if you want to ruin it


Another favourite of mine:

Let x=y
Multiply both sides by x:
x^2=xy
Subtract y^2 from both sides:
x^2-y^2=xy-y^2
Factorise both sides:
(x+y)(x-y)=y(x-y)
Divide both sides by (x-y):
x+y=y
2y=y
2=1

Why is this not true?

Tom
My System SpecsSystem Spec
18 May 2013   #30
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Lol, that's a fallacy

From the equation, we are subject to determine the values of the variables, x and y. Isn't it? Not the values of the constants.

Taking your calculations, we get
Let x=y
Multiply both sides by x:
x^2=xy
Subtract y^2 from both sides:
x^2-y^2=xy-y^2
Factorise both sides:
(x+y)(x-y)=y(x-y)
Divide both sides by (x-y):
x+y=y
or, x=y-y
or, x=0
putting the value of x in the initial condition, we get
y=0

To determine any other values of x and y, we need at least one more equation.

Number of possible outcomes are calculated as "number of possible outcomes in a trial to the power number of trials".

Number of possible outcomes for tossing a coin thrice (as good as John's original question) =8 (2*2*2). For throwing a die thrice= 216 (6*6*6). For drawing a card 3 times (with replacement) from a pack = 140608 (52*52*52).
My System SpecsSystem Spec
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar help and support threads
Thread Forum
Puzzle By This
Was watching my computer and the gadget show high CPU usage. Click on it expecting many one of my programs was running in the background but noticed the following screen shot. Does anyone know what DSD_5996 is?
General Discussion
Partitions puzzle
Here's a few screenshots all from the same machine. Diskpart shows: Disk Management shows:
Installation & Setup
Forum puzzle
I was trying out how a picture as a link would work. I tried with 2 identical strings. The first one would not work and the second worked. Go figure - as far as I can see they are exactly the same. Does anybody see a difference. If you copy/paste them from the script into a Notepad or Wordpad, they...
Chillout Room
Monitor Puzzle
Re: 7 o/s. During running of a system test, a pop-up appeared saying the following; Current input timing is not supported by the monitor display. Change input timing to 1600x900 60Hz. Because I was stuck and it wouldn't go any further, no matter what buttons I pushed on my monitor, I shut it down...
Graphic Cards
Network puzzle
Can anybody help before I become even more hairless! I've been trying to sort out this for many hours. I have - a recently purchased Windows 7 Pro Lenovo T420 laptop which is wireless an XP Pro IBM T43 wireless laptop a Dell XP Home desktop connected to my wireless router by Ethernet...
Network & Sharing
slow internet puzzle
hi every1, I had win 7(32 bit) ultimate installed and while downloading from sites like mediafire, megaupload I used to get transfer rate upto 300 Kb/sec (my broadband speed is 128b KBPS) then due to some problem I had to format my HD and install vista which came along with my PC. Now the...
Network & Sharing


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 09:28.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App