12 Days of Christmas
12th
Abundant Numbers
218th
Abundant Numbers (Long)
166th
Arabic to Roman
72nd
Arithmetic Numbers
142nd
Ascending Primes
99th
Catalan Numbers
135th
Christmas Trees
254th
Collatz
348th
Day of Week
176th
Divisors
425th
Evil Numbers
1st
Evil Numbers (Long)
41st
Farey Sequence
143rd
Fibonacci
66th189th
Fizz Buzz
88th135th
Foo Fizz Buzz Bar
103rd
Fractions
41st
Happy Numbers
232nd
Happy Numbers (Long)
136th
ISBN
112th
Leap Years
439th
Look and Say
44th
Lucky Numbers
106th
Niven Numbers
318th
Niven Numbers (Long)
132nd
Odious Numbers
156th
Odious Numbers (Long)
111th
Ordinal Numbers
88th
Pangram Grep
213th
Pascal’s Triangle
46th
Pernicious Numbers
148th
Pernicious Numbers (Long)
105th
Prime Numbers
56th
Prime Numbers (Long)
232nd
Quine
1st75th
Roman to Arabic
132nd
Tongue-twisters
165th
Vampire Numbers
92nd