12 Days of Christmas
10th
Abundant Numbers
205th
Abundant Numbers (Long)
149th
Arabic to Roman
71st
Arithmetic Numbers
130th
Ascending Primes
81st
Catalan Numbers
121st
Christmas Trees
237th
Collatz
326th
Day of Week
154th
Divisors
409th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
134th
Fibonacci
62nd173rd
Fizz Buzz
86th126th
Foo Fizz Buzz Bar
92nd
Fractions
34th
Happy Numbers
220th
Happy Numbers (Long)
125th
ISBN
100th
Leap Years
418th
Look and Say
37th
Lucky Numbers
98th
Niven Numbers
302nd
Niven Numbers (Long)
120th
Odious Numbers
145th
Odious Numbers (Long)
100th
Ordinal Numbers
84th
Pangram Grep
197th
Pascal’s Triangle
41st
Pernicious Numbers
136th
Pernicious Numbers (Long)
89th
Prime Numbers
49th
Prime Numbers (Long)
213th
Quine
1st65th
Roman to Arabic
120th
Tongue-twisters
151st
Vampire Numbers
82nd