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Imagine you’re at a bar and another patron offers you the following wager. He’s going to flip a coin — a standard U.S. penny like the ones seen above — a dozen or so times. If it comes up heads more often than tails, he’ll pay you $20. If it comes up tails more than heads, you pay him the same. There are no hidden tricks. It’s a fair bet — safe to take, if you’re looking for a 50/50 chance.
Now, imagine the same offer, except that instead of flipping the coin, the other patron tells you he’s going to spin it. In fact, he’ll even let you provide the penny, just to guarantee there is no funny business. Twenty-five spins and if it comes up heads more often than tails, he’ll give you $20 again. But if tails comes up more often, you owe him $20.
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Fair bet? Not if Persi Diaconis is right.
Diaconis is a professor of mathematics and statistics at Stanford University and, formerly, a professional magician. While his claim to fame is determining how many times a deck of cards must be shuffled in order to give a mathematically random result (it’s either five or seven, depending on your criteria), he’s also dabbled in the world of coin games. What he and his fellow researchers discovered (here’s a PDF of their paper) is that most games of chance involving coins aren’t as even as you’d think. For example, even the 50/50 coin toss really isn’t 50/50 — it’s closer to 51/49, biased toward whatever side was up when the coin was thrown into the air.
But more incredibly, as reported by Science News, spinning a penny, in this case one with the Lincoln Memorial on the back, gives even more pronounced odds — the penny will land tails side up roughly 80 percent of the time. The reason: the side with Lincoln’s head on it is a bit heavier than the flip side, causing the coin’s center of mass to lie slightly toward heads. The spinning coin tends to fall toward the heavier side more often, leading to a pronounced number of extra “tails” results when it finally comes to rest.
Because the coins typically pick up dirt and oils over time, trying the experiment at home may not yield such a large percentage of “tails” over “heads” — but a relatively new coin should still give you noticeable results.
Bet and Spin is a brilliant mixed sports and casino bonus offer from Coral Casino
Coral Casino gives new and existing customers a weekly casino bonus via Bet and Spin. This promotion is perfect if you love playing casino games but also like the odd sports bet too.
Virtually every week (at least during the football season) you can claim a casino bonus worth up to £100. Bet and Spin involves placing a bet on the relevant sporting event in order to gain a guaranteed casino bonus.
If you already have a Coral account, read on for the Bet and Spin terms and conditions. If you don’t, click the button below to claim your amazing 500% casino bonus!
Important info: 18+. New Players only. Min £10 buy-in to get £50 bonus. 24 x (Bonus) wagering reqs apply. Bonus valid for 30 days (bonus and winnings removed). Certain games excluded. Bets covering 67% or more of Roulette table don’t count to wagering. T&Cs Apply.
Coral Bet And Spin Offs
Bet and Spin at Coral Casino
As said, you’ll need to have a Coral account to claim this bonus. You can read all about the bet £10, £50 casino bonus at Coral. Note you can also claim a bonus on your 2nd and 3rd deposits at Coral Casino. Alternatively read our main Coral Casino review.
However, assuming you already know the joys of Coral, here are the key terms of Bet and Spin.
- Bet £10 or more on Bet and Spin match
- Minimum odds of 1/2 apply
- Win guaranteed casino bonus of £2 to £100
- Bet and Spin wagering is just 10 times bonus value
Coral Bet And Spin Mop
You can claim this bonus each and every week during the football season! You can see which game will feature in Bet and Spin on the Coral Casino promotions page. Then, just place a single on that game. It’s usually the biggest Premier League match of the Sunday.
However, Bet and Spin has also been offered on other football leagues and cups and even other sports.
Just place a £10 single on the Bet and Spin fixture at odds of 1/2 or higher and you are GUARANTEED a casino bonus. You don’t need to opt in or claim this offer – the bonus will be added automatically. Bets online or on mobile are valid and the casino bonus will be added within 24 hours of your qualifying bet settling.
Perhaps the best thing about Bet and Spin though is the low wagering attached to it. Whether your bonus is just £2 or the maximum £100, the wagering is a mere 10 times the bonus!
With most casino bonuses having wagering significantly higher that means you have a great chance of cashing in some hard cash each week. The usual games restrictions apply, meaning slots and some games count 100% but others count less. But with just 10 times the bonus this really is an amazing promo.
This is just yet another great reason to join the Coral Casino. Click the button below to claim your £50 casino bonus. For just a tenner of your own money that’s an amazing deal. And with regular weekly offers like this one on top, it’s no wonder that Coral’s Casino is one of our favourites!