12 Days of Christmas
47th
Abundant Numbers
155th
Abundant Numbers (Long)
130th
Arabic to Roman
17th
Arithmetic Numbers
117th
Ascending Primes
78th
Catalan Numbers
130th
Christmas Trees
209th
Collatz
312th
Day of Week
151st
Divisors
394th
Evil Numbers
1st
Evil Numbers (Long)
38th
Farey Sequence
131st
Fibonacci
64th185th
Fizz Buzz
88th683rd
Foo Fizz Buzz Bar
285th
Fractions
50th
Happy Numbers
200th
Happy Numbers (Long)
112th
ISBN
65th
Leap Years
423rd
Look and Say
75th
Lucky Numbers
83rd
Niven Numbers
302nd
Niven Numbers (Long)
114th
Odious Numbers
152nd
Odious Numbers (Long)
108th
Ordinal Numbers
4th
Pangram Grep
179th
Pascal’s Triangle
77th
Pernicious Numbers
143rd
Pernicious Numbers (Long)
93rd
Prime Numbers
53rd
Prime Numbers (Long)
195th
Quine
1st72nd
Roman to Arabic
106th
Tongue-twisters
101st
Vampire Numbers
64th