Quiz Time!

Alright guys! It is quiz time!
Rules:
1-You CAN NOT CHEAT by looking up the answer on the internet. Well actually I can't stop you, but I really hope you don't.
2-For every question, I will assign a number of points. The first to answer the question will get the points.


Current points:
-8: barfix
-6: -Shivam-
-4: Rhino.Freak
-

Q1: 4 people are trapped in a dark cave. The exit of the cave can be reached by using a rope bridge. The bridge can only hold 2 people at a time. Since it is dark, you need a source of light to walk safely without falling. The group of 4 have got only 1 torch. They've got 17 minutes to pass the bridge, or else, the bridge will fall apart. The 4 people differ in their speed such that:
-The first can pass the bridge in 1 minute.
-The second can pass the bridge in 2 minutes.
-The third can pass the bridge in 5 minutes.
-The fourth can pass the bridge in 10 minutes.

Now arrange for them a plan such that they all manage to reach the other side of the bridge in 17 or less minutes. Put in mind that if a faster guy is to accompany a slower one, the faster will have to move in the pace of the slower one. IE: If the 1 minute guy moves with the 2 minutes guy, they will both take 2 minutes to pass the bridge.

Question Points: 3

Okay I have a question. Do the guys who crossed the bridge, do he needs to come back to return the torch or something?

Well they ALL need to have use a torch to pass. But since only 2 can pass at a time, one of the 2 will have to return back with the torch for a plan.

Is it possible for them to throw the torch to the other side of the bridge?
JK i know it's not hmmmmm...
EDIT: OK got it first the (i'll say the time instead of first and such) 1 and 2 walk together than 1 comes back 5 and 10 go 2 comes back and 1 and 2 go and pa pau end in time 2+1+10+2+2=17 minutes!
is it ok?

YES! CORRECT! First 3 points for barfix!!
Luckily, I still have got a second question for today:
Q2: You are participating in a TV show. In this show, you will be asked to select 1 of 3 doors to win a car. 2 contains a donkey and the 3rd contains the car. Now when you state your guess, before the door you pick opens, the TV guy will reveal for you a door with a donkey in it. You will then have a chance to change your guess into either the door you previously picked or the one that is left.
Now, what is the probability that you are going to win the car by changing your guess?

Question Points: 2


Current points:
-3: barfix
-

Your probability of winning a car by changing your guess is 0.333 or 1/3.
Is it right?

I think you have a 2/3 chance of winning if you change your guess. Yup, I think that's the probability you should have.

Initially the probability to win is 1/3
Later it gets 1/2 .. If I got the question that is

Heh? I wish you guys would have shown how you approached the question.
The one to get the right answer is SHIVAM!!

Explanation:
To win a car by changing your guess would mean that you have to pick a door with a donkey at first. The probability of picking a donkey door is 2/3. Now, if the door you picked at first was a donkey door, then the last remaining door MUST be the door for the car; the probability of it being the car is one. Multiplicating the 2 probabilities (since its an "AND" condition):
1*2/3 is 2/3!
And Shivam gets the points!

Q3:

You are put in a room with 3 switches. 1 of these switches connects to a light bulb in another room, while the other 2 are irrelevant. Now the question is, which? You're allowed to stay in any of the 2 rooms for as long as you like, but you can only move in between the rooms once; that is, from the switch room to the bulb room. The 2 rooms are not connected by any windows or cavities; just walls. Remember, you can only go from the switch room to the bulb room.
Question points: 4

Current points:
-3: barfix
-2: -Shivam-
-

Can't you just turn on all three switches?

EDIT: Oh, sorry, forgot that you're supposed to find out which switch is the one that connects to the light bulb.

EDIT #2: Thought about it for almost 10 minutes and only one answer came to my mind. First press 1st switch, keep it on for about 10 minutes and then turn it off. Now press the 2nd switch and go and see if the bulb is on. If it's on, then the 2nd switch is the correct one, if it isn't, touch the bulb and see if it's warm. Most bulb gets hot when turned on so if it's warm then the 1st switch is the correct one. If it isn't warm, then the 3rd switch is the correct one.

You are a smart one shivam i would never have thought about it that way

Yea! Nice job man! It will work~
+1

Lol Shivvy that may not work for a CFL !!

Aaaand, AGAIN, SHIVAM GETS IT CORRECT!!

Q4: Decipher the following message:


Question Points: 5

AND SHIVAM TAKES THE LEAD!
Current points:
-6: -Shivam-
-3: barfix
-

That's an easy one why 5 points
"I AM HUNGRY"

Damn barfix, y u fast? I knew this one

Wait, I didn't get this one. Can you explain how does that mean "I'm hungry"?

Well he doubled every word and turned them to their side, at first (from the left) there is 2 I but like they are "lying on the side" than two arrows for space and then 2 A one over the other and so on, got it?

A_man chose it because he WAS hungry XD!

And barfix gets it right!
@Shivam: I  just rotated every letter by 90 degrees and then I mirrored everything on the x-axis supposing every letter got a minor part of it under the x-axis. A space, however, was denoted by a "<=>" symbol.
@barfix: It wasn't that easy :/.

Okay here is another puzzle which I just found and I couldn't find an answer for it yet. But I will post it anyways, and I will be back when I have solved it to see if someone has found the answer:

unsolvable question (changed):

Q5: You have got 8 balls which are identical, but one of them is a bit lighter in weight. You've got a 2-armed balance which you are only allowed to use it twice. Now what you have to do is use these 2 tries to find which ball is the lighter one.
Question Points: 4
(Credits to Jassi for the question! Oh and I've solved it this time. So I am 100% sure that there is an answer now.)
barfix takes the lead again! Way to go barfix!
Current points:
-8: barfix
-6: -Shivam-
-

After spending 30 minutes on this .. I came to the conclusion that it is IMPOSSIBLE

seriously~

Yeah I'm with rhino it's impossible but still nice one.
EDIT: checked it out on the net and it's impossible on a 2 dimensional platform but on a 3 dimensional platform it's possible and even easy, so give us the next one A-MAN

Good thing I gave up on this after 7 minutes.

impossible is not in my dictionary :

cant the neighbors just help each other out or something?

XD!
i don't think they would care looool!

@Pack: Lol not really. My question says clearly to connect every station to each house
Anyways, I changed the question. Scroll to the older question post to see it.

We make set of 3 3 and 2.. we measure weihhts of both 3 set of ball.. if they balance, in next try we put the remaining 2 at different ends and get our ball.
If it doesnt balance, we pick 2 from the set of 3 balls which were lighter, and measure..if it balances, the oter one is our ball. If it isnt, we find it anuways

First you take 2 groups of 3 and put them on the scales:
A.If they are balanced than one of the other two is the light one you put the 2 on the scales and get which one is the light.
B.If they are unbalanced you take the lighter group of 3 balls and do the following, you take two of the 3 and put them on the scales:
1.If they are balanced the third ball is the light one.
2.If they are unbalanced then got which is lighter.
Done:D!
EDIT: You are a fast one Rhino  

Damn that was fast hmmm

Lol yeah. It took me a while to figure out the answer! Congratulations Freaky! You're finally in the list now!
Also, so that I don't run up of question, I will be posting question less frequently now. Here is the final one for today:

Q6: Here is a false expression:

Now you got to make this true by adding 1 single straight line to the image. The condition is that this line must not touch the equal sign.
Question Points: 4


Current points:
-8: barfix
-6: -Shivam-
-4: Rhino.Freak
-

I'm on the phone so I'll write what to do:
You have 5+5+5=550
Now you need to connect with straight line the left point and the upper point of the + to make it 4 and then you have
545+5=550
Or
5+545=550
Done

Daamn you are one fast guy Barfix .. Nice job.
A-MAN : how many questions? Any prize? Result? Stuff?

Aaand barfix gets it correct!
@Freaky: I will just keep giving these till I run out of them XD. There isn't a prize or anything. Just for fun! I will consider an award or something like that for the future though.

Q7: You have got 2 kinds of medicine pills you need to have. The 2 kinds are identical to each other (color, shape, mass, weight...etc), but each has a different effect. The doctor has told you that you must have 2 pills of the first kind, and 2 pills of the other, else you will die . The problem is that you have had all the pills mixed together. What can you do?
Question Points: 6

Current points:
-12: barfix
-6: -Shivam-
-4: Rhino.Freak
-

You go and buy new ones XD

Nope. The pills were custom-made for you and you can't find them in stores. Think harder. Imagine this situation has happened to yourself, what would you do?

Q7 Answer, just eat all of them. Drink then if you in luck you will survive! *Logic*

Are we aware of what effect which medicine brings to us?? How many total pills are there??
Damn A-MAN.. Such a weird question must have 5 points atleast. :
I really cant say anything but takee 4 of them randomly & eat.. atleast that's what i'd do irl..
If thats not the case then ill pass thos one..

Lool guys, you're weird. Update the amount of points you get. Hope this is enough to keep you thinking.
The total number of each kind of pills is equal (you can assume it is 20).

What about taste and smell? Maybe one is a little more bitter and smells differently than other.

Nope. The smell and the taste of both kinds are exactly the same.
Here is a hint: Google something called "Entropy". Read the Wiki page and then think how can Entropy and Thermodynamics relate to the problem.

Just a random guess. Put all the pills in a closed container. Then heat it. Since Entropy is a state function, both pills will have different properties on how much heat is transferred into them.. Based on it, we can differentiate the pills.. There you go, my random guess.

No No NO! lol. I did say that the solution relates to thermodynamics, but it isn't so related that the answer itself is thermodynamics. The main idea of the 2nd law of thermodynamics doesn't have to do, but has in common for what can be the solution. Good try though! Although you didn't get the answer right, you did learn something new XD.

Hmph.. .. my chemistry sucks.. but I would put them in water instead of heating.

Hmph... that is not really the answer, nor it does have much to do with chemistry. I can say that you're approaching the solution in the right way now. Why would you put them in water?

He obviously randomly said it.

Solubility can be checked.........Physical appearance , weight might be same but it cannot be said that all physical properties are same...OTHERWise we are dealing with allotropes here lol !!


Optical properties can also be checked........


THE important thing is that those methods of differentiaition should be used wherein the pill is not affected...

A-MAN.. Change it already.. I guess no one can answer it

i can, but i won't
loool!

Because A-MAN already told you the answer?

The answer to this damn thing is so stupidly unexpectable lol