| 1.The billionth digit of pi is 9. 2.111,111,111 x 111,111,111 = 12,345,678,987,654,321 3.The year 1666 is the only year in Roman numerals to be written from highest to lowest value (MDCLXVI). 4.The number 4 has four letters. In the English language there is no other number whose number of letters is equal to its value. 5.If you divide the Great Pyramid's perimeter by two times it's height, you get pi to the fifteenth digit. 6.If the first 4,294,967,286 digits of pi were pritten on a paper with six digits per centimeter, it would stretch more than 7,000 kilometers. 7.In 1942, two mathematicians at the University of Chekiang in China proved only 13 convex polygons could be formed by using all 7 tans. They were able to form 1 triangle, 6 quadrilaterals, 2 pentagons, and 4 hexagons. 8.123,456,789 X 9 = 111,111,111 123,456,789 X 18 = 222,222,222 123,456,789 X 27 = 333,333,333 123,456,789 X 36 = 444,444,444 etc. 9.The word trigonometry was first used in a publication in 1595 by German mathematician Bartholomaeus Pitiscus. 10.In 1853, the English mathematician William Shanks published the value of pi to 707 decimal digits. The calculation had taken him 15 years and was surpassed only in 1945, when computations made an early desk calculator showed that the last 180 decimal places he had calculated were incorrect. 11.A perfect number is a number equal to the sum of all its proper divisors smaller than the number itself including 1. The number 6 is the smallest perfect number. The next perfect numbers are 28, 496, and 8,126. No odd perfect numbers are known. 12.The largest known perfect number is 2^13466916(2^13466917 -1). It was discovered in 2001. (The ^ denotes an exponent). 13.In 1989, Gregory and David Chudnovsky at Columbia University in New York City calculated the value of pi to 1,011,961,691 decimal places. They performed the calculation twice on an IBM 3090 mainframe and on a CRAY-2 supercomputer with matching results. 14.Eleftherios Argryopoulos of Greece, has discovered 520 different proofs of the Pythagorean theorem over a period of 11 years from 1986 to 1997 (world record). 15.The digits of pi 314159 appears at least 6 times in the first 10 million digits of pi. 16.The sequence 0123456799 starts in the first digit 17,387,594,880, 26,852,899,245, 30,243,957,439, 34,549,153,953, 41,952,536,161, and 43,289,964,000. 17.The sequence 9876543210 starts in the first digit 21,981,157,633, 29,832,636,867, 39,232,573,648, 42,140,457,481, and 43,065,796,214. 18.The sequence of e at 27182818284 starts in the first digit 45,111,908,393. |
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