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2. Two-cube calendar - Wikipedia

   en.wikipedia.org/wiki/Two-cube_calendar

   A two-cube calendar is a desk calendar consisting of two cubes with faces marked by digits 0 through 9.Each face of each cube is marked with a single digit, and it is possible to arrange the cubes so that any chosen day of the month (from 01, 02, ... through 31) is visible on the two front faces.

3. Squared triangular number - Wikipedia

   en.wikipedia.org/wiki/Squared_triangular_number

   A square whose side length is a triangular number can be partitioned into squares and half-squares whose areas add to cubes. From Gulley (2010).The n th coloured region shows n squares of dimension n by n (the rectangle is 1 evenly divided square), hence the area of the n th region is n times n × n.

4. List of prime numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_prime_numbers

   This is a list of articles about prime numbers. A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers. Subsets of the prime numbers may be generated with various formulas for primes.

5. List of numbers - Wikipedia, the free encyclopedia

   en.wikipedia.org/wiki/List_of_numbers

   A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.

6. Centered cube number - Wikipedia

   en.wikipedia.org/wiki/Centered_cube_number

   The centered cube number for a pattern with n concentric layers around the central point is given by the formula [1] + (+) = (+) (+ +). The same number can also be expressed as a trapezoidal number (difference of two triangular numbers), or a sum of consecutive numbers, as [2]

7. Tetrahedral number - Wikipedia

   en.wikipedia.org/wiki/Tetrahedral_number

   Te 12 = 364 is the total number of gifts "my true love sent to me" during the course of all 12 verses of the carol, "The Twelve Days of Christmas". [3] The cumulative total number of gifts after each verse is also Te n for verse n. The number of possible KeyForge three-house combinations is also a tetrahedral number, Te n−2 where n is the ...

8. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.

9. List of non-standard dates - Wikipedia

   en.wikipedia.org/wiki/List_of_non-standard_dates

   January 0 or 0 January is an alternative name for December 31.January 0 is the day before January 1 in an annual ephemeris.It keeps the date in the year for which the ephemeris was published, thus avoiding any reference to the previous year, even though it is the same day as December 31 of the previous year.