12 Days of Christmas
10th
Abundant Numbers
198th
Abundant Numbers (Long)
145th
Arabic to Roman
70th
Arithmetic Numbers
126th
Ascending Primes
75th
Catalan Numbers
116th
Christmas Trees
232nd
Collatz
308th
Day of Week
149th
Divisors
403rd
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
126th
Fibonacci
62nd161st
Fizz Buzz
84th121st
Foo Fizz Buzz Bar
87th
Fractions
33rd
Happy Numbers
215th
Happy Numbers (Long)
121st
ISBN
97th
Leap Years
409th
Look and Say
36th
Lucky Numbers
96th
Niven Numbers
295th
Niven Numbers (Long)
114th
Odious Numbers
137th
Odious Numbers (Long)
94th
Ordinal Numbers
83rd
Pangram Grep
192nd
Pascalβs Triangle
40th
Pernicious Numbers
130th
Pernicious Numbers (Long)
85th
Prime Numbers
47th
Prime Numbers (Long)
204th
Quine
1st63rd
Roman to Arabic
115th
Tongue-twisters
149th
Vampire Numbers
82nd