Lateral Thinking VIII and IX

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sstimson
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Re: Lateral Thinking VIII and IX and more ;-)

Post by sstimson »

While that might work, is it a good way to get the bad coins mixed up with the good ones?

If you were doing this for real (  as in looking for lead slugs ) is it possible once you know that bad pile to take only the bad coins out with out mixing up them with the good ones?

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Re: Lateral Thinking VIII and IX and more ;-)

Post by S.H. »

[spoiler]oh..sry..i assumed 1/100 gram for 1 coin (which is not faulty) and x is the mass for 1 faulty coin, was really sleepy last night so i didn't explain it clearly  ;D[/spoiler]
bash7353
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Re: Lateral Thinking VIII and IX and more ;-)

Post by bash7353 »

[spoiler]Assuming x is the weight of one not faulty coin, then the weight of a faulty coin is x+0.1g or x-0,1g. Now if we name the weight of the 55 measured coins y, then with this term you can determine which set is the faulty one:

(55x-y)/(0.1g)

Since the entity gramm is in x and also in y, it can be canceled so the result of this is without any entity.
The result might be negative, might be positive so you have to use the absolute value.[/spoiler]

Edit: Spoiler-tags are now in the right position.
Last edited by bash7353 on March 10th, 2009, 9:19 am, edited 1 time in total.
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Re: Lateral Thinking VIII and IX and more ;-)

Post by Holmes »

Hey! If we continue this thread, it will become really popular! So, keep the problems on everyone.



*EDIT* Mathemathical problem

A clock is observed. The hour hand is exactly at the minute mark, and the minute hand is six minutes ahead of it. Later, the clock is observed again. This time, the hour hand is exactly on a different minute mark, and the minute hand is seven minutes ahead of it. How much time elapsed between the first and second observations?
Last edited by Holmes on March 11th, 2009, 9:42 pm, edited 1 time in total.
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Re: Lateral Thinking VIII and IX and more ;-)

Post by S.H. »

[spoiler]
2 + 12k hour and 12 minutes
where k is a non negative integer
[/spoiler]
bash7353
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Re: Lateral Thinking VIII and IX and more ;-)

Post by bash7353 »

Question:
[spoiler]Does it matter that there's only one possiblity for the first observation to be right, because if you put the hour hand onto a particluar minute mark the minute mark has to be on an specific spot, like if the hour hand point exacty onto the 5, then it is exacty 0500 hours, so the minute hand points onto the 12.
This all would be if the clock is very accurate, which most are not.[/spoiler]
"Vad ska jag annars vara?" - "Det vet jag inte. Det måste du svara på. Men om du släpper allt du tror att du måste, och frågar dig vad du vill... Vad vill du då?"
描いた夢は叶わないことの方が多い
秀れた人を羨んでは自分が嫌になる
浅い眠りに押し潰されそう夜もある
優しい隣人が陰で牙を向いていたり

惰性で観てたテレビ消すみたいに生きることを時々辞めたくなる

人生は苦痛ですか 成功が全てですか
僕はあなたにあなたに ただ逢いたいだけ
信じたい嘘 効かない薬 帰れないサヨナラ
叫べ叫べ叫べ   逢いたいだけ
Holmes
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Re: Lateral Thinking VIII and IX and more ;-)

Post by Holmes »

Those are not solutions

There is a concrete time and answer.
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Re: Lateral Thinking VIII and IX and more ;-)

Post by S.H. »

is my answer correct?  :-\
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Re: Lateral Thinking VIII and IX and more ;-)

Post by x64_02 »

[spoiler]1:12-3:24
two hours and 12 minutes[/spoiler]

Which is basically what S.H. said.
Last edited by x64_02 on March 12th, 2009, 11:54 pm, edited 1 time in total.
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