12 Days of Christmas
57th
Abundant Numbers
169th
Abundant Numbers (Long)
145th
Arabic to Roman
17th
Arithmetic Numbers
125th
Ascending Primes
91st
Catalan Numbers
144th
Christmas Trees
233rd
Collatz
331st
Day of Week
167th
Divisors
404th
Evil Numbers
1st
Evil Numbers (Long)
43rd
Farey Sequence
142nd
Fibonacci
67th197th
Fizz Buzz
90th703rd
Foo Fizz Buzz Bar
299th
Fractions
67th
Happy Numbers
211th
Happy Numbers (Long)
121st
ISBN
77th
Leap Years
444th
Look and Say
90th
Lucky Numbers
96th
Niven Numbers
319th
Niven Numbers (Long)
124th
Odious Numbers
163rd
Odious Numbers (Long)
117th
Ordinal Numbers
7th
Pangram Grep
190th
Pascal’s Triangle
89th
Pernicious Numbers
158th
Pernicious Numbers (Long)
105th
Prime Numbers
61st
Prime Numbers (Long)
208th
Quine
1st82nd
Roman to Arabic
114th
Tongue-twisters
112th
Vampire Numbers
73rd