12 Days of Christmas
45th
Abundant Numbers
146th
Abundant Numbers (Long)
119th
Arabic to Roman
17th
Arithmetic Numbers
108th
Ascending Primes
59th
Catalan Numbers
119th
Christmas Trees
195th
Collatz
286th
Day of Week
134th
Divisors
377th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
122nd
Fibonacci
62nd164th
Fizz Buzz
84th658th
Foo Fizz Buzz Bar
266th
Fractions
46th
Happy Numbers
188th
Happy Numbers (Long)
100th
ISBN
58th
Leap Years
404th
Look and Say
69th
Lucky Numbers
79th
Niven Numbers
286th
Niven Numbers (Long)
103rd
Odious Numbers
140th
Odious Numbers (Long)
96th
Ordinal Numbers
4th
Pangram Grep
166th
Pascal’s Triangle
75th
Pernicious Numbers
133rd
Pernicious Numbers (Long)
82nd
Prime Numbers
48th
Prime Numbers (Long)
181st
Quine
1st63rd
Roman to Arabic
97th
Tongue-twisters
95th
Vampire Numbers
60th