12 Days of Christmas
45th
Abundant Numbers
148th
Abundant Numbers (Long)
121st
Arabic to Roman
17th
Arithmetic Numbers
110th
Ascending Primes
62nd
Catalan Numbers
121st
Christmas Trees
197th
Collatz
296th
Day of Week
135th
Divisors
379th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
125th
Fibonacci
62nd166th
Fizz Buzz
85th666th
Foo Fizz Buzz Bar
271st
Fractions
46th
Happy Numbers
189th
Happy Numbers (Long)
100th
ISBN
59th
Leap Years
409th
Look and Say
69th
Lucky Numbers
79th
Niven Numbers
290th
Niven Numbers (Long)
104th
Odious Numbers
143rd
Odious Numbers (Long)
98th
Ordinal Numbers
4th
Pangram Grep
166th
Pascal’s Triangle
75th
Pernicious Numbers
135th
Pernicious Numbers (Long)
83rd
Prime Numbers
49th
Prime Numbers (Long)
182nd
Quine
1st63rd
Roman to Arabic
98th
Tongue-twisters
95th
Vampire Numbers
60th