# Tag Info

Accepted

### 68 coins with 100 weighings

It seems to me that there's a simpler solution than the one accepted above. Step 1: Step 2: Step 3: The point here is that
Accepted

### Simulating an unbiased coin with a biased one

One possibility: This works because: EDIT: Inspired by @trolley813's answer here is a way to recycle the rejected entropy:

### Coin Game with infinite paradox

OK, let's actually take this seriously. As others have said, this is the so-called St Petersburg paradox, and the reason it isn't really much of a paradox is that (1) an extra dollar matters much less ...

### 68 coins with 100 weighings

I see, it took me too long to fininsh my drawing, but let me present it as additional material to sousben's answer:
Accepted

### Simulating a biased coin with an unbiased one

Yes, you can do it like this: Why does this work?
Accepted

### Coin removal problem

The row of coins can be fully removed if it has the following property: Proof: Solving strategy:

### Coin Game with infinite paradox

This gambling problem is the famous St. Petersburg paradox. It is a paradox because The one issue with this theoretical result is that it requires no upper limit on the possible winnings - if you ...
Accepted

### How will Y lose the game?

Generalization. There are $K$ coins on the table and one player can pick as many as M coins at once.

### How will Y lose the game?

Using winning/losing position analysis you can tell that the correct move is to take: You can work this out iteratively. If you have 1 coin and it is your turn you will obviously lose. Thus 1 is a ...

I would pay

### 68 coins with 100 weighings

Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Then This makes a total of:
Accepted

### Five Men and Four Coins Puzzle

For my answer I'm considering the sides of the coin to either have a star or be blank for ease of writing. I also will write out the number for peoples name, and use the character for guesses to try ...

### Sand Castle Builder Glass Ceilings Puzzle

There are several physical versions of this puzzle: (Elephant) Spinout, by thinkfun: The Brain, by Mag-Nif: and the traditional Chinese Rings puzzle: The solution is based on the Binary Gray Code. ...

### Coin Game with infinite paradox

There are several nuances to this question. First of all, it asks how much you are willing to pay, not what price is fair. Second, you have to understand, that even if a game is fair, that does not ...

### Coin Game with infinite paradox

I would not pay anything. I would not play. I would encourage you to not play. Are you doing okay? I'm willing to help you out of you need help. I would offer you a hug. You are my best friend, ...
Accepted

### 12 coins problem but you can't understand the scale

This was quite a fun twist on weighing puzzles. The fact we don't know what the scale outputs mean requires us to, as part of our weighing procedure, decipher the scale's output. Luckily, we only need ...

### Five Men and Four Coins Puzzle

The first toss is a star (*) or not (-). Mr Two immediately loses. The second flip can be either, so we have **, *-. -*, or --. Also on that flip, The third and fourth flip and To sum:

### How will Y lose the game?

X should pick up Because Examples:
Accepted

### The Dollar Bill

One Dollar One dollar Which should look something like the following image:

### Simulating a biased coin with an unbiased one

This works because

### Bag of gold coins weighing with a digital scale

Numbering the bags from 1 to 100, here is the weighing strategy: To deduce the true bag, let...   $t$ be the weight of a true coin.   $\delta$ be the difference between weight of a fake ...

### 12 coins problem but you can't understand the scale

Once you can identify which symbol means "equal", this reduces to the original problem. That is because if you follow a valid strategy assuming that A means "left heavier" and B ...
Accepted

### Sand Castle Builder Glass Ceilings Puzzle

N=1 N=2 N=3 N=4 N = 5 N = 6 Formula for any N: