12 Days of Christmas
9th
Abundant Numbers
193rd
Abundant Numbers (Long)
139th
Arabic to Roman
67th
Arithmetic Numbers
118th
Ascending Primes
71st
Catalan Numbers
112th
Christmas Trees
226th
Collatz
301st
Day of Week
142nd
Divisors
397th
Evil Numbers
1st
Evil Numbers (Long)
32nd
Farey Sequence
120th
Fibonacci
62nd159th
Fizz Buzz
83rd115th
Foo Fizz Buzz Bar
84th
Fractions
32nd
Happy Numbers
205th
Happy Numbers (Long)
117th
ISBN
92nd
Leap Years
402nd
Look and Say
35th
Lucky Numbers
93rd
Niven Numbers
289th
Niven Numbers (Long)
110th
Odious Numbers
135th
Odious Numbers (Long)
91st
Ordinal Numbers
79th
Pangram Grep
186th
Pascalβs Triangle
35th
Pernicious Numbers
129th
Pernicious Numbers (Long)
80th
Prime Numbers
45th
Prime Numbers (Long)
200th
Quine
1st58th
Roman to Arabic
111th
Tongue-twisters
143rd
Vampire Numbers
79th