12 Days of Christmas
51st
Abundant Numbers
161st
Abundant Numbers (Long)
137th
Arabic to Roman
17th
Arithmetic Numbers
118th
Ascending Primes
82nd
Catalan Numbers
134th
Christmas Trees
218th
Collatz
319th
Day of Week
158th
Divisors
394th
Evil Numbers
1st
Evil Numbers (Long)
40th
Farey Sequence
134th
Fibonacci
66th188th
Fizz Buzz
88th690th
Foo Fizz Buzz Bar
290th
Fractions
53rd
Happy Numbers
204th
Happy Numbers (Long)
115th
ISBN
66th
Leap Years
429th
Look and Say
82nd
Lucky Numbers
86th
Niven Numbers
308th
Niven Numbers (Long)
119th
Odious Numbers
155th
Odious Numbers (Long)
110th
Ordinal Numbers
4th
Pangram Grep
183rd
Pascal’s Triangle
79th
Pernicious Numbers
147th
Pernicious Numbers (Long)
99th
Prime Numbers
56th
Prime Numbers (Long)
202nd
Quine
1st72nd
Roman to Arabic
109th
Tongue-twisters
105th
Vampire Numbers
66th