12 Days of Christmas
12th
Abundant Numbers
217th
Abundant Numbers (Long)
164th
Arabic to Roman
72nd
Arithmetic Numbers
141st
Ascending Primes
96th
Catalan Numbers
132nd
Christmas Trees
249th
Collatz
344th
Day of Week
170th
Divisors
424th
Evil Numbers
1st
Evil Numbers (Long)
39th
Farey Sequence
140th
Fibonacci
64th187th
Fizz Buzz
88th135th
Foo Fizz Buzz Bar
101st
Fractions
41st
Happy Numbers
229th
Happy Numbers (Long)
135th
ISBN
108th
Leap Years
433rd
Look and Say
42nd
Lucky Numbers
102nd
Niven Numbers
315th
Niven Numbers (Long)
130th
Odious Numbers
153rd
Odious Numbers (Long)
109th
Ordinal Numbers
87th
Pangram Grep
207th
Pascal’s Triangle
44th
Pernicious Numbers
146th
Pernicious Numbers (Long)
102nd
Prime Numbers
54th
Prime Numbers (Long)
226th
Quine
1st72nd
Roman to Arabic
129th
Tongue-twisters
163rd
Vampire Numbers
91st