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774 Posts

Lol, the anwser has got to be "No Solution" .

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7,168 Posts

Here is another one from the Snark Discussion List

There is a prison with N prisoners, each one allocated in a different cell. One day, the warden tells them the following. All prisoners will be interrogated, one by one, in the interrogation room. Each prisoner will be interrogated arbitrary often. In the interrogation room, there is a switch with the positions 'on' and 'off'; the present position is 'on'. The prisoners are free to observe and turn the switch during each interrogation. The warden will not turn the switch. All prisoners will be released as soon as one of them correctly tells the warden that all prisoners have been interrogated at least once. However, if the claim is incorrect, they will never get free. Beside the

switch, there is no exchange of information possible between the prisoners. They now get one hour to devise a strategy that will guarantee their release.

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7,168 Posts

Ok ill post a(much) easier one this time

a=b

a²=b²

a²-b²=b²-ab

(a+b)(a-b)=-b(a-b)

a+b=-b

a=-2b (but a=b)

a=-2a

1=-2

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12,032 Posts

It doesn't look like a cute Kirby?

(>' ')>

(>' ')>

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774 Posts

You can't cancel out (a-b) on the fifth line. I dunno why exactly, but it's obviously screwing things up.Proto said:Ok ill post a(much) easier one this time

what's wrong here?

a=b

a^2=b^2

a^2-b^2=b^2-ab

(a+b)(a-b)=-b(a-b)

a+b=-b

a=-2b (but a=b)

a=-2a

1=-2

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4,912 Posts

EDIT: maybe i shud make myself clear, you linear algebra freak EDIT 2: "linear algebra freak" was pointed at [email protected] u for bringing my school life to these forums.

A=B

A^2-B^2 = B^2 - A^2 = 0

(A+B)(A-B)= B^2-AXB =0

(A+B)(A-B)=B(B-A)=0

(A+B)(A-B)=B(A-B)=0 * since A=B,A-B=B-A=0

the next step, where you "cancel" out, is simply dividing the entire expression by A-B, which is 0. The axioms of the number system define this as being illegal. Hence, everything onwards is screwed.

you can't assume A-B = 0 .....A could be 7 and B could be 5 for all you knowD.D. said:ill try ...because A-B = 0. in order to cancel them out, you wud need to divide 0 by 0, which is illegal.

oh...didn't see that little note :laugh:D.D. said:kirby, he said a=b

In that case, you would be right then

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7,168 Posts

@Unicron: Its one of the notable products (i dunno if that's the exact translation but

(a+b)(a-b) = a²+ab-ab-b²= a² -b²

@bcrew1375: You can start out by seeing that in a sum of any 2 numbers, the maximum carry you will have will be 1. so you can assume that the P equate to 1. By this, the first R will be summed with just an obligued carry of 1, , so we will make this R equate 9 for making sure there will be a carry.

By further insight, we will know that will we sum this U of 9 with the carry of 1 we will produce a 10, resulting in the E equating zero.

The rest of the operation follows a similar reasoning

About the third problem, it was an incongruency. The point was at finding what went wrong

Ok now for

The fourth problem

Ok this one is about analytical reading

A pharmacist had just turned off the lights of the drugstore when a man appeared, and he asked for money. The owner oppened the cash register. Once the money was obtained it was put quickly in the jacket and the young man dissapeared.

You have to answer the following questions with: True, False, or Indetermined

1. A man appeared after the owner turned off the lights

2. The thief was male

3. The man that appeared didn't ask for money

4. The owner oppened the cash register and he left

5. Once the man asked that the money was put in his jacket, he left running

6. Even though the cash register had money, the story doesnt tells how much

7.The thief asked the money to the owner

8. An pharmacist had just turned off the lights when a man appeared

9. It was midday when the man appeared

10 The man that appeared at the drugstore opened the cash register.

Since the context is very delicate, I'll post the problem in the original language (spanish) if someone thinks i made a mistranslation, by all means tell me since its quite important

Un farmacéutico acababa de apagar las luces de la farmacia cuando

apareció un hombre, y pidió dinero. El propietario abrió la caja

registradora. Una vez conseguido el dinero fue colocado apresuradamente

en uno de los bolsillos de la cazadora y el joven desapareció.

2. True

3. False

4. Indetermined

5. Indetermined

6. True

7. Uh, True, I guess... :/

8. True

9. Indetermined

10. False

The context is kind of screwing me up. :/

Here's freetranslation.com's interpretation:

A pharmacist had just put out the lights of the pharmacy when appeared a man, and asked money. The owner opened the cash register. Once it obtained the money was placed hasty in one of the pockets of the hunter and the youth disappeared.

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