12 Days of Christmas
51st
Abundant Numbers
157th
Abundant Numbers (Long)
133rd
Arabic to Roman
17th
Arithmetic Numbers
118th
Ascending Primes
78th
Catalan Numbers
131st
Christmas Trees
212th
Collatz
313th
Day of Week
153rd
Divisors
394th
Evil Numbers
1st
Evil Numbers (Long)
38th
Farey Sequence
132nd
Fibonacci
64th186th
Fizz Buzz
88th684th
Foo Fizz Buzz Bar
285th
Fractions
51st
Happy Numbers
200th
Happy Numbers (Long)
112th
ISBN
66th
Leap Years
425th
Look and Say
77th
Lucky Numbers
85th
Niven Numbers
305th
Niven Numbers (Long)
115th
Odious Numbers
153rd
Odious Numbers (Long)
109th
Ordinal Numbers
4th
Pangram Grep
179th
Pascal’s Triangle
78th
Pernicious Numbers
145th
Pernicious Numbers (Long)
95th
Prime Numbers
54th
Prime Numbers (Long)
197th
Quine
1st72nd
Roman to Arabic
107th
Tongue-twisters
101st
Vampire Numbers
65th