math

  1. Additive Persistence

  2. Generate a Walsh Matrix

  3. The Snail in the Well

  4. How many steps does it take from n to 1 by subtracting the greatest divisor?

  5. Multiply two numbers

  6. Un-average temperatures!

  7. XOR reduction bools
  8. Difference of the square of the sum

  9. Integer Linear Programming

  10. Distance between the Sun and the nth planet
  11. Crazy 8s Code Golf

  12. Distance between two points on the Moon
  13. Conway's game of life

  14. Return closest to zero

  15. Collatz Conjecture (OEIS A006577)

  16. How does math work in Anastasiya's world?

  17. Converting ISBN-13 to ISBN-10

  18. Weapons of Math Instruction

  19. Zero-sum counting
  20. (-a) × (-a) = a × a

  21. These are the Frequencies, Kenneth

  22. Opposite of the digital root!

  23. Is it a pleasing number?

  24. Fast inverse square root
  25. Output numbers, more or less

  26. A prime test that's LITERALLY prime
  27. Minimize Least Used Binary Bits in Fractions
  28. Calculate the p-adic norm of a rational number

  29. Bijective function ℤ → ℤⁿ

  30. Find the largest number of distinct integers that sum to n

  31. Efficient Scientific Notation

  32. Reciprocal Fibonacci constant

  33. Fibonacci’s sexagesimals
  34. Determinant of an Integer Matrix
  35. 1, 2, 3, 14... or is it 15?
  36. Generate the list [1, 0, -1, 0, 1, 0, -1, 0, ...]

  37. Output the sign
  38. Two steps forward and one step back
  39. Permutations such that no k+2 points fall on any polynomial of degree k
  40. Balanced Ternary Converter

  41. Codegolf the Hafnian

  42. Am I a Self Number?
  43. Calculate the cube root of a number

  44. Print the positive non-zero integer n-tuple(s) that solve an inequality within a bound
  45. Work out root(x, n)

  46. Finite Field Multiplication

  47. Golf a golf-scorer

  48. Answer-Chaining - Positive divisors of a number

  49. Divisibility test
  50. Shorten an already short mathematical expression
  51. Generalized matrix trace
  52. Golf a number bigger than TREE(3)
  53. Find the number in the Champernowne constant

  54. What is my exponential potential?
  55. Get the best of two Arrays

  56. Count sum of all digits
  57. Print a bunch of uninteresting numbers!
  58. Calculate the Hafnian as quickly as possible

  59. The Rien Number

  60. Be as evil as possible
  61. Construct a companion matrix
  62. Bailey–Borwein–Plouffe Iterations

  63. Euler-Poincaré-Characteristic of Polyhedra

  64. One OEIS after another

  65. All non-empty finite sets of positive integers
  66. Calculate the Peirce quincuncial projection of the Earth

  67. Schläfli Convex Regular Polytope Interpreter
  68. Decompose Polynomials
  69. Calculate the n-th iterate of a polynomial for a specific value; fⁿ(x)
  70. There can be only 1!

  71. Rotate the Roots
  72. Locally invert a Polynomial

  73. Irreducible polynomials over GF(5)

  74. Gamma Function Golf
  75. Hermitian matrix?

  76. Evaluate expressions with significant figures

  77. Quartic Summation

  78. Are the numbers amicable?

  79. Fast Trig Calculation
  80. Necklace splitting problem

  81. Sparse Protractor

  82. Continued Fraction of Digit-wise Sum of Square Roots
  83. Stereographic projection of polyhedra
  84. Number of sums of factors

  85. Output N in base -10
  86. Golf the Subset-Sum Problem

  87. Count without 3

  88. The Non-Zero Digital Product Challenge

  89. Factoring factorials
  90. Implement hyperexponentiation/tetration without the use of '^'

  91. Implement Rijndael's S-box
  92. Simplify a continued fraction
  93. Rotate a hypercube

  94. Code-Challenge: Farey sequence (II)

  95. Find the dot product of Rationals

  96. Fibonacci-orial

  97. Approximate Brun's Constant

  98. Calculate the Super-Logarithm

  99. Factorial digit sum

  100. Given an int input n, print out n*reversed(n)