Anchor Dates:
Each and every year, the following dates fall on the same day of the week as is the last day in February of that year (whether it’s a leap year or not) :| 4.4 | 4th April |
| 6.6 | 6th June |
| 10.10 | 10th October |
| 12.12 | 12th December |
| 5.9 9.5 | 5th September 9th May |
| 7.11 11.7 | 7th November 11th July |
How many different games of Solitaire are possible?
A well shuffled deck of cards has 52 factorial different possibilities. You can think of it this way. The first card you put down can be any one of 52 possible cards. The next card can be any one of the 51 remaining cards. The next can be any one of the remaining 50, and so on. This is expressed mathematically as 52! possibilities:52! = 52 * 51 * 50 * … * 3 * 2 * 1 = 8 x 1067That’s 8 with 67 zeros after it. Let’s say you took 7 billion persons (roughly the number of people on our planet) and asked them to play 1'000 games of solitaire each, every single day, for the next 1'000'000 years. So if the entire human race are doing nothing but playing a thousand solitaire per day for a million years; they would play:
7'000'000'000 * 1'000 * 365 * 1'000'000 = 2'555'000'000'000'000'000'000 = 2 x 1021 different games = 2 x 10-45 % of total possibilities.All that solitaire playing does not even begin to put a dent in all the possible games of solitaire! Hence it is quite possible that every game of solitaire you ever play is unique and will never be played again ever; although your odds of winning are roughly 1 out of 6 games.
How fast does the earth spin?
- Standing on the equator, you'll have a linear speed of 1'036 mph (1'667 kph) or mach=1,4.
- An average bolt of lightning carries an electric current of 30,000 amperes and transfers 500 mega-joules of energy (megawatts).
