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    The Calendar hole will go live in approximately . Why not try and solve it ahead of time?

    fkantelberg

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    12 Days of Christmas
    104th
    99 Bottles of Beer
    65th
    Abundant Numbers
    12th
    Abundant Numbers (Long)
    16th
    Arabic to Roman
    55th
    Arithmetic Numbers
    11th
    Arrows
    23rd
    Ascending Primes
    59th
    ASCII Table
    48th
    brainfuck
    56th
    Card Number Validation
    24th
    Catalan Numbers
    151st
    Catalan’s Constant
    40th
    Christmas Trees
    79th
    Collatz
    207th56th83rd 75th
    CSS Colors
    72nd
    Cubes
    62nd
    Day of Week
    111th
    Diamonds
    62nd
    Divisors
    1st
    Emirp Numbers
    178th
    Emirp Numbers (Long)
    107th
    Emojify
    90th
    Evil Numbers
    135th
    Evil Numbers (Long)
    38th
    Factorial Factorisation
    21st
    Farey Sequence
    89th
    Fibonacci
    131st485th169th189th62nd76th191st542nd 47th186th257th55th
    Fizz Buzz
    42nd
    Foo Fizz Buzz Bar
    19th
    Forsyth–Edwards Notation
    35th
    Fractions
    58th
    Gijswijt’s Sequence
    82nd
    Happy Numbers
    1st
    Happy Numbers (Long)
    134th
    Hexdump
    34th
    Intersection
    25th
    Inventory Sequence
    180th
    ISBN
    184th
    Jacobi Symbol
    35th
    Kaprekar Numbers
    65th
    Kolakoski Constant
    27th
    Kolakoski Sequence
    13th
    Leap Years
    224th 27th
    Levenshtein Distance
    64th
    Leyland Numbers
    207th
    ln 2
    69th
    Lucky Numbers
    162nd
    Lucky Tickets
    99th
    Mandelbrot
    22nd
    Medal Tally
    94th
    Niven Numbers
    289th
    Niven Numbers (Long)
    60th
    Odious Numbers
    99th
    Odious Numbers (Long)
    81st
    Ordinal Numbers
    62nd 37th 1st
    Pangram Grep
    37th
    Partition Numbers
    57th
    Pascal’s Triangle
    22nd
    Pernicious Numbers
    160th
    Pernicious Numbers (Long)
    103rd
    Prime Numbers
    26th 156th
    Prime Numbers (Long)
    51st
    Proximity Grid
    50th
    Quine
    72nd
    Repeating Decimals
    77th
    Reverse Polish Notation
    39th
    Seven Segment
    199th
    Time Distance
    34th
    United States
    117th
    Van Eck Sequence
    166th
    Zodiac Signs
    37th
    π
    48th
    τ
    60th
    φ
    86th
    √2
    141st
    𝑒
    94th