Question: Suppose we have 8 coins that look/smell/taste/roll exactly the same and a balance like the one in the picture. One of the coins is fake, it weights less than the rest. How can we find the fake coin with only two weightings.
Answer:
We weight 6 coins - 3 on each side.
If their weight is the same
We weight the remaining two to find the fake coin (the lighter one)
If 3 coins are lighted than the rest
We pick two of them and weight them on the scale (one on each side)
If their weight equals then the lighter is the remaning coin
Else the lighted in the scale is the fake one
Question: Suppose there is a rope of certain length and a lighter. How can someone find the exact midpoint of the rope?
Answer: We light the rope from each side. Where the fire meets then thats the middle of the rope
Ok guys. I have collected a few interview questions, in the form of riddlers, that I have encountered the past couple of years. So:
Question: Suppose we have 8 coins that look/smell/taste/roll exactly the same and a balance like the one in the picture. One of the coins is fake, it weights less than the rest. How can we find the fake coin with only two weightings.
Question: Suppose there is a rope of certain length and a lighter. How can someone find the exact midpoint of the rope?
I was 18 years old when I saw him on the street. He was with Giovanni Oliveira, the great striker of Olympiacos. I am actually sure that people haven't even heard of Nery Castillo at that point. Now, in his early 20s, not only he has Europe at his feet, but yesterday he helped Mexico win Brazil with his solo. But the point of this post is not to introduce him or to hail him for his performance against Brazil (watch videos at the end).
About five months ago he could have joined the greek national team, but the greek football federation decided that he is not suitable for us. But which one of them is qualified to judge the talent of the Mexican boy? What is your job anyway? Because the last few years we have seen no improvements of any kind in the greek football...And this incident people who lead the greek football are occupied with a great deal of other stuff, but football. Congratulations guys, you just crossed the line to completely useless.