I don't know what you are up to. But there are many things I can do to solve real life problems. One of them could be something like this:
Turn on key#1 for 5 minutes, then turn off. Turn on key#2 and go to the second room.
Key#2 is for the lamp being "on".
Key#1 is for the hot lamp being "off".
Key#3 is for the cool lamp being "off".
I don't know what you are up to. But there are many things I can do to solve real life problems. One of them could be something like this:
Turn on key#1 for 5 minutes, then turn off. Turn on key#2 and go to the second room.
Key#2 is for the lamp being "on".
Key#1 is for the hot lamp being "off".
Key#3 is for the cool lamp being "off".
yes you said the answer thank you very much
was it hard ???
Not at all. I'm an engineer. I work with electronics as a hobby. When you troubleshoot or fix electronics stuffs you need to have a much higher level of creativity.
The word you're looking for is "switch", not "key". It confused me for a second...
I dont understand the answer?
The point is that you can go in the first room (the one with the switches) as many times as you want. So you turn on a switch, wait for a while (lightbulbs warm up when used), then switch the first one back off and switch another one on. Before the first one has the time to cool, you now have three different lightbulbs: a lit one, a warm unlit one, and a cool unlit one.
now azukikuru has explained that the "key" is not a key but a switch I do understand, but on a side note why would you have 3 lamps in one room and the switches in another?
yes key not , switch . im sorry
I prefer the Winawer variation.
who has good and hard puzzles ? post them
You're blindfolded. I have a deck of cards. 20 cards are face up, the rest face down. Now I shuffle the cards and hand you the deck. Your task is to arrange the cards in two piles with the same amount of cards turned face up. How do you go about this?
Assuming you maintained orientation of cards in the shuffle and that the shuffle was a perfect riffle shuffle go through the deck alternating the pile you place the card in.
TheGrobe's solution assumes you flipped the second pile back into the face down orientation before shuffling ... it works for that assumption.
If your shuffle was not perfect and orientation is maintained it may be possible with a sufficiently old deck to determine whether a card is face up or face down by feel, since the cards tend to be (consistently) slightly concave or convex (depending on handling).
1st weighing: ( if the fake is lighter )
7-6
then the lighter of the 2 is broken up and you weigh again
3-3 if 6 is lighter: 4-3 if 7 is lighter
finally the lighter of the 2 is tested again:
2-1 for 3; 2-2 for 4
You have to cross a bridge. It takes three minutes to cross the bridge (this is running as fast as you can, you can't go any faster than three minutes). At the mid point of the bridge, there is a hut, and a guard lives in the hut. There are no windows in the hut, so you can't see the guard, and he can't see you.
Every two minutes, the guard comes out of the hut, and is able to catch anyone who is anywhere on the bridge at that point in time. He will grab them, and throw them back to the side they were coming from.
The only piece of equipment you have is a watch, or other time-keeping device. How do you cross the bridge successfully?
You have to cross a bridge. It takes three minutes to cross the bridge (this is running as fast as you can, you can't go any faster than three minutes). At the mid point of the bridge, there is a hut, and a guard lives in the hut. There are no windows in the hut, so you can't see the guard, and he can't see you.
Every two minutes, the guard comes out of the hut, and is able to catch anyone who is anywhere on the bridge at that point in time. He will grab them, and throw them back to the side they were coming from.
The only piece of equipment you have is a watch, or other time-keeping device. How do you cross the bridge successfully?
You are MacGyver.
There is one IQ test . If you want you can solve it and leave me message or post a topic here .
The test : There are 2 rooms across from to each other . There are 3 keys in the first room and there are 3 lamps in the other room . and we dont know which key is for which lamp . we can just one time go to the second room ( that room which the lamps are there ) . Now how should we understand which key is for which lamp ???
# nobody can help you
# There arnt any windows in rooms
# You can not see the other room when you are in one of them