dailymathercise.blogspot.com
Daily Mathercise: Knots
http://dailymathercise.blogspot.com/2010/03/knots.html
Simple mathematical exercises for fun each day (excluding Sundays). I am a father, a mathematician and sometime blogger whose unconventional posts often blur the lines between blogging and staring blankly at a glowing screen. View my complete profile. My Main Math Blog. MATH with my KIDS. Here are some shadblow (Amelanchier canadensis) or serviceberry leaves that I collected from my yard this past Fall. Their tattered appearance speaks of th. On This Day in Math - August 23. News from the world of maths.
dailymathercise.blogspot.com
Daily Mathercise: Geometry + Working Memory
http://dailymathercise.blogspot.com/2010/03/geometry-working-memory.html
Simple mathematical exercises for fun each day (excluding Sundays). I am a father, a mathematician and sometime blogger whose unconventional posts often blur the lines between blogging and staring blankly at a glowing screen. View my complete profile. My Main Math Blog. MATH with my KIDS. Here are some shadblow (Amelanchier canadensis) or serviceberry leaves that I collected from my yard this past Fall. Their tattered appearance speaks of th. On This Day in Math - August 23. News from the world of maths.
numbersandmath.blogspot.com
Numbers and math: febrero 2012
http://numbersandmath.blogspot.com/2012_02_01_archive.html
Lunes, 27 de febrero de 2012. Primes as sum of ascending powers in more than one way. In more than one way:. Others primes as sum of powers (a. More than one way :. 139, 157, 179, 181, 191, 193, 197, 199, 211, 223, 227, 239, 241, 251, 257, 269, 271, 281,. 283, 293, 307, 311, 313, 331, 349, 359, 367, 373, 389, 409, 419, 421, 431, 433, 439, 443,. 449, 457, 461, 463, 479, 487, 499, 521, 541, 547, 563, 569, 571, 593, 599, 617, 641, 673,. 1423, 1777, 1979, 1997, 1999. Enviar por correo electrónico.
numbersandmath.blogspot.com
Numbers and math: enero 2012
http://numbersandmath.blogspot.com/2012_01_01_archive.html
Jueves, 26 de enero de 2012. Since I was a kid, I have always been amazed by the fact that when multiplying four or seven by three, the two products obtained have the same digits but in a different position. Now that I'm a little older, not much, it still surprises me that there are numbers that when they are multiplied by two different numbers, its products are a permutation of each other. Two years ago I published 8 sequences. Based on these facts in the OEIS. The title of each of these sequences is:.
numbersandmath.blogspot.com
Numbers and math: To split a number in primes in n ways
http://numbersandmath.blogspot.com/2012/06/to-split-number-in-primes-in-n-ways.html
Domingo, 3 de junio de 2012. To split a number in primes in n ways. 23 It is the smallest number that is the concatenation of two primes 2 and 3. 237 is the smallest number that can be separated into two primes in two different ways: 2-37, 23-7. 2337 is the smallest number that can be separated into two primes in three different ways: 2-337, 23-37, 233-7. 29397 is the smallest number that can be separated into two primes in four different ways: 2-9397, 29-397, 293-97, 2939-7. 5, 77, 1549, 23077.
numbersandmath.blogspot.com
Numbers and math
http://numbersandmath.blogspot.com/2012/05/final-30-digits-of-9999-9.html
Viernes, 18 de mayo de 2012. The final 30 digits of 9999. 359916012598740083996400089999, is prime in addition to having 9 copies of 9 and ending in 9999. Enviar por correo electrónico. Publicar un comentario en la entrada. Suscribirse a: Enviar comentarios (Atom). Mi lista de blogs. 160; Math-Frolic! Make a Sugihara Circle/Square Optical Illusion Out of Paper. How This Election Is Like A Three Stooges Pie Fight – Game Theory Tuesdays. Republic of Mathematics blog. Tanya Khovanova's Math Blog.
numbersandmath.blogspot.com
Numbers and math: octubre 2010
http://numbersandmath.blogspot.com/2010_10_01_archive.html
Lunes, 25 de octubre de 2010. My contributions to Prime Curios. Here are my contributions to Prime curios. The smallest prime which when sandwiched between a two-digit repdigit gives a multiple of 11. In other words 1111, 2112, 3113, 4114, 5115, 6116, 7117, 8118, and 9119 are multiples of 11. 97 and its double (194) and triple (291) use the same number of characters (five) when expressed in Roman numerals: XCVII, CXCIV, and CCXCI. The 269th day of a non-leap year is 26 September (26/9). The smallest prim...
SOCIAL ENGAGEMENT