12 Days of Christmas
15th
Abundant Numbers
229th
Abundant Numbers (Long)
173rd
Arabic to Roman
73rd
Arithmetic Numbers
152nd
Ascending Primes
108th
Catalan Numbers
147th
Christmas Trees
271st
Collatz
362nd
Day of Week
186th
Divisors
440th
Evil Numbers
1st
Evil Numbers (Long)
43rd
Farey Sequence
154th
Fibonacci
67th197th
Fizz Buzz
90th142nd
Foo Fizz Buzz Bar
108th
Fractions
45th
Happy Numbers
240th
Happy Numbers (Long)
146th
ISBN
120th
Leap Years
455th
Look and Say
45th
Lucky Numbers
112th
Niven Numbers
330th
Niven Numbers (Long)
139th
Odious Numbers
165th
Odious Numbers (Long)
117th
Ordinal Numbers
90th
Pangram Grep
221st
Pascal’s Triangle
48th
Pernicious Numbers
159th
Pernicious Numbers (Long)
112th
Prime Numbers
62nd
Prime Numbers (Long)
240th
Quine
1st83rd
Roman to Arabic
135th
Tongue-twisters
172nd
Vampire Numbers
99th