The five yuan coins are brass, and the ten yuan coins are made out of bronze.

Here's one that's in prototyping by Medtronic that's smaller than a penny.

Then you toss the coin.

... if we use pennies.

And they do that here, and that knocks the coins down the slot, and when that happens, they get a peanut.

The crows learn that all they have to do is show up, wait for the coin to come out, put the coin in the slot, and then they get their peanut.

Let's decide by coin toss.

This is an automated payphone you use it by inserting a coin.

So suppose we toss a coin repeatedly.

Let's decide with a coin toss.

There are also 1, 5 and 10 baht coins and 25 and 50 satang coins 100 satangs equal 1 baht.

Can you imagine tossing a coin successively?

Now, they're used to the sound of the machine, and they keep coming back, and digging out these peanuts from amongst the pile of coins that's there.

The coin toss decides who will kick off the match.

This is the other side of the things that we like.

So if you toss a coin twice, the chance of getting a head twice are a half that's the chance the first time times a half the chance a second time.

Five of them would still weigh less than a rupee coin.

Woo, pretty, huh. This is the other side of the coin.

They're on coins that date back 3,000 years.

One side of a coin is called 'heads' and the other side is called 'tails'.

After the invention of coins, it became easy to sell books, lessons, and instructions. The development of coins is part of the reason that both the classical world around ancient Lydia and China in the Han Dynasty were so advanced compared to other parts of the world.

Now if you think about it, if I tossed a coin a hundred times, and I'm allowed to withhold from you the answers half the times, then I can convince you that I have a coin with two heads.

The first time they do it, maybe it happens after the 10th toss, as here.

So, on this side, you get out your coins, and you toss and toss and toss.

And eventually some crow gets a bright idea that, Hey, there's lots of coins lying around from the first stage, lying around on the ground, hops down, picks it up, drops it in the slot.

And you keep tossing, to wait for the next head, to get excited.

When you toss a coin, you get a sequence of heads and tails.

Rome responded by reducing the gold silver content (the ancient equivalent of monetization), which led to sustained inflation in the empire. But the frequent discovery of Roman coins in India suggests that Roman coinage continued to be accepted internationally long after it must have been obvious that its gold or silver content had fallen.

Daphne Koller So this is which coin you pick, and this is the two tosses.

These are, in fact, two sides of the same coin.

We got 250,000 coins from the central bank, at different darknesses.

And we move to the third stage, where we only give them a coin.

To know with confidence that the coin is ordinary, with no hidden features, one must log a sufficiently large number of coin flips and check whether the data include equal numbers of heads and tails over the long run. After thousands of coin tosses, if the data still show a bias toward heads, one may be justified in thinking that the coin has some unusual properties.

You all know what the likelihood is of pulling the ace of spades or of flipping a heads.

To use, insert a coin or a phone card, dial a number (all telephone numbers have nine digits), then speak

Despite this wealth, Spain became increasingly indebted, eventually defaulting three times in 1607, 1627, and 1649 nbsp and heading into sharp geopolitical decline. Yet Spanish silver coins (known as pieces of eight or Spanish dollars) remained the main currency used in world trade right up to the American Revolutionary War.

Despite this wealth, Spain became increasingly indebted, eventually defaulting three times in 1607, 1627, and 1649 and heading into sharp geopolitical decline. Yet Spanish silver coins (known as pieces of eight or Spanish dollars) remained the main currency used in world trade right up to the American Revolutionary War.

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In fact, the average number of tosses till head tail head is 10 and the average number of tosses until head tail tail is eight.

Imagine this half of the audience each get out coins, and they toss them until they first see the pattern head tail tail.

And you count the number of times until the pattern head tail head appears and you average them. OK?

Now, the idea is simple when we're applying it to coin tosses, but in fact, it's not very simple in everyday life.

You can take a hardware and have that hardware do different things at different times, or have different parts of the hardware doing different things.

You can either take a risky loss so I'll flip a coin. If it comes up heads, you're going to actually lose a lot.

And then they leave, and the machine spits up more coins and peanuts, and life is really dandy, if you're a crow.