a question.. who knows?

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Imraan said:
OK...heres a tough one. Use your mathematical skills for this one.

A shopkeeper has an old-style scale...you know the type where you put some known weight one one side and the stuff you want to weigh on the other side. This guy has only four pieces of weights. With these four he can weigh from 1 kg to 40 kg (no grams please).

Supposing he wants to weigh 35 kg or 8 kg or whatever....he can do it using only these four weights. Its not necessary to use ALL of them at the same time though.

What are these four weights?
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Is it 1kg, 3kg, 9kg and 27kg weights?
 
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AabiruSabeel said:
:sl:
Is it 1kg, 3kg, 9kg and 27kg weights?
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You are one smart wayfarer.

Here's another:

There are three switches downstairs. Each corresponds to one of the three light bulbs in the attic. You can turn the switches on and off and leave them in any position.

How would you identify which switch corresponds to which light bulb, if you are only allowed one trip upstairs?
 
Imraan said:
You are one smart wayfarer.

Here's another:

There are three switches downstairs. Each corresponds to one of the three light bulbs in the attic. You can turn the switches on and off and leave them in any position.

How would you identify which switch corresponds to which light bulb, if you are only allowed one trip upstairs?
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if im understanding this correctly then there is only one light switch for the three light bulbs :? in other words three switches are used for the one bulb. :? so you would only need 1 trip to the attic anyway since the 3 light switchs are connected to the only one light bulb.
 
Imraan said:
There are three switches downstairs. Each corresponds to one of the three light bulbs in the attic. You can turn the switches on and off and leave them in any position.

How would you identify which switch corresponds to which light bulb, if you are only allowed one trip upstairs?
Click to expand...

I think this is a hard question :-\ but I'll give a try :

If I was in downstairs and I'm allowed to have only one trip upstairs I'll do this :
1) I'll turn on 2 switchs S1 and S2, and I'll leave third switch S3 off.
2) I'll turn off one of the 2 activated switchs S2 for example. So now I have : S1=ON; S2=OFF; S3=OFF
3) I'll go quickly upstairs. And the only lighted Lamp L1 is for S1(which is on), and the 2 other lamps are off. The lamp L2 which is off but still warm is for S2, because I activated S2 for some seconds before turning it off. And the last lamp L3 which is off but cold is for S3, because S3 was originally off.

that's my solution.
 
Ummu Sufyaan said:
if im understanding this correctly then there is only one light switch for the three light bulbs :? in other words three switches are used for the one bulb. :? so you would only need 1 trip to the attic anyway since the 3 light switchs are connected to the only one light bulb.
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No, there are three light switches. You have to identify which one corresponds to which light bulb in the attic. But you can go upstairs only once....when you reach there you have to correctly point out the bulbs according to their light switches.
 
**muslimah** said:
^From where did bro AabiruSabeel get those numbers?
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Sister...actually its not very difficult. You have to start from 1 kg and go up one by one. With the numbers that brother AabiruSabeel gave you can weigh from 1 - 40 kg without any problems. 1 is already there...for 2 kg put 3 kg weight on one side and 1 kg on the other side along with 2 kg of stuff you wanna weigh....and so on.
 
marwen said:
I think this is a hard question :-\ but I'll give a try :

If I was in downstairs and I'm allowed to have only one trip upstairs I'll do this :
1) I'll turn on 2 switchs S1 and S2, and I'll leave third switch S3 off.
2) I'll turn off one of the 2 activated switchs S2 for example. So now I have : S1=ON; S2=OFF; S3=OFF
3) I'll go quickly upstairs. And the only lighted Lamp L1 is for S1(which is on), and the 2 other lamps are off. The lamp L2 which is off but still warm is for S2, because I activated S2 for some seconds before turning it off. And the last lamp L3 which is off but cold is for S3, because S3 was originally off.

that's my solution.
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Boy!! that was very smart. And a very good way to explain too. Now its your turn. Fire away........
 
Imraan said:
Now its your turn. Fire away........
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Oh.. well I don't have the skill to make hard ones like all of you, but I'll put 2 questions :

1) you have 9 points, how to draw 4 segments passing through these points (no free point) : you can give a description or post a picture.

2) what piece of clothes that you don't like, and when you put it on, you don't see it ?

answer any one or the both. XD
 
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Imraan said:
There is nothing to believe here...its all basic math. Anyway sorry for getting too geeky....lets continue with the puzzles

How can you throw a ball as hard as you can and have it come back to you, even if it doesn't bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you.
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you throw it as hard as you can straight in front of you, it flies round the earth sattelite styl and hits you in the back of the head,
 
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How can you throw a ball as hard as you can and have it come back to you, even if it doesn't bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you.
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throw it up ( then it will be attracted by earth gravity and come back to you).
 
Imraan said:
Sister...actually its not very difficult. You have to start from 1 kg and go up one by one. With the numbers that brother AabiruSabeel gave you can weigh from 1 - 40 kg without any problems. 1 is already there...for 2 kg put 3 kg weight on one side and 1 kg on the other side along with 2 kg of stuff you wanna weigh....and so on.
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Got it, Jazakallah. I did think of that, but I thought that the scale needs to be in balance to weigh so...
 
There was a window cleaner who was cleaning a window on the 25th floor of a skyscraper. He suddenly slips and falls, though he is not wearing a safety harness and there is nothing to slow him down, yet he suffers no injurries. How do you account for that?
 
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^oh no . You are. . . .





















Correct!

Finally my turn :-\
Ok Next:

What are you when you dive into an empty pool?

Ok this one is kinda funny , for me anyway :-\

So yeah, again its a Q on Logic
 

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