12 Days of Christmas
51st
Abundant Numbers
159th
Abundant Numbers (Long)
136th
Arabic to Roman
17th
Arithmetic Numbers
118th
Ascending Primes
79th
Catalan Numbers
132nd
Christmas Trees
214th
Collatz
316th
Day of Week
155th
Divisors
394th
Evil Numbers
1st
Evil Numbers (Long)
38th
Farey Sequence
133rd
Fibonacci
64th187th
Fizz Buzz
88th688th
Foo Fizz Buzz Bar
289th
Fractions
52nd
Happy Numbers
201st
Happy Numbers (Long)
113th
ISBN
66th
Leap Years
425th
Look and Say
78th
Lucky Numbers
86th
Niven Numbers
305th
Niven Numbers (Long)
116th
Odious Numbers
153rd
Odious Numbers (Long)
109th
Ordinal Numbers
4th
Pangram Grep
179th
Pascal’s Triangle
78th
Pernicious Numbers
146th
Pernicious Numbers (Long)
97th
Prime Numbers
54th
Prime Numbers (Long)
198th
Quine
1st72nd
Roman to Arabic
108th
Tongue-twisters
104th
Vampire Numbers
66th