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2. Category:20 (number) - Wikipedia

   en.wikipedia.org/wiki/Category:20_(number)

   Download as PDF; Printable version; In other projects Wikimedia Commons; ... Pages in category "20 (number)" The following 10 pages are in this category, out of 10 total.

3. Kaktovik numerals - Wikipedia

   en.wikipedia.org/wiki/Kaktovik_numerals

   30,561 10 3,G81 20 ÷ ÷ ÷ 61 10 31 20 = = = 501 10 151 20 30,561 10 ÷ 61 10 = 501 10 3,G81 20 ÷ 31 20 = 151 20 ÷ = (black) The divisor goes into the first two digits of the dividend one time, for a one in the quotient. (red) fits into the next two digits once (if rotated), so the next digit in the quotient is a rotated one (that is, a five). (blue) The last two digits are matched once for ...

4. List of prime numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_prime_numbers

   Download as PDF; Printable version; ... A090968) [20] 20 p − 1 ≡ 1 (mod p 2): 281, 46457, 9377747 ... All prime numbers from 31 to 6,469,693,189 for free ...

5. List of types of numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_types_of_numbers

   Ternary: The base-three numeral system with 0, 1, and 2 as digits. Quaternary: The base-four numeral system with 0, 1, 2, and 3 as digits. Hexadecimal: Base 16, widely used by computer system designers and programmers, as it provides a more human-friendly representation of binary-coded values.

6. 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.

7. Table of prime factors - Wikipedia

   en.wikipedia.org/wiki/Table_of_prime_factors

   Download as PDF; Printable version; ... A factorial x! is the product of all numbers from 1 to x. The first: 1, 2, 6, 24, 120 ... This page was last edited on 20 ...

8. 20 (number) - Wikipedia

   en.wikipedia.org/wiki/20_(number)

   Download as PDF; Printable version; ... 2 2 × 5: Divisors: 1, 2, 4, 5, 10, 20: ... the number 20 is used as an index in measuring visual acuity. 20/20 indicates ...

9. 1729 (number) - Wikipedia

   en.wikipedia.org/wiki/1729_(number)

   1729 is composite, the squarefree product of three prime numbers 7 × 13 × 19. [1] It has as factors 1, 7, 13, 19, 91, 133, 247, and 1729. [2] It is the third Carmichael number, [3] and the first Chernick–Carmichael number. [a] Furthermore, it is the first in the family of absolute Euler pseudoprimes, a subset of Carmichael numbers.