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

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Abundant Numbers
46th
Abundant Numbers (Long)
34th
Arithmetic Numbers
18th
Card Number Validation
9th
Catalan Numbers
34th
Collatz
33rd
Divisors
37th
Evil Numbers (Long)
26th
Factorial Factorisation
9th
Farey Sequence
12th
Fibonacci
66th
Fizz Buzz
105th
Gijswijt’s Sequence
11th
Happy Numbers
24th
Happy Numbers (Long)
21st
Intersection
12th
Inventory Sequence
14th
ISBN
18th
Jacobi Symbol
14th
Kaprekar Numbers
8th
Kolakoski Sequence
16th
Leap Years
43rd
Leyland Numbers
21st
N Queens
8th
Niven Numbers
29th
Niven Numbers (Long)
21st
Odious Numbers
33rd
Ordinal Numbers
15th
Pangram Grep
22nd
Pascal’s Triangle
30th
Pernicious Numbers
34th
Prime Numbers
36th
Prime Numbers (Long)
26th
Recamán
16th
Reverse Polish Notation
13th
Roman to Arabic
12th
Rule 110
17th
SI Units
6th
√2
54th