12 Days of Christmas
45th
Abundant Numbers
143rd
Abundant Numbers (Long)
118th
Arabic to Roman
17th
Arithmetic Numbers
108th
Ascending Primes
58th
Catalan Numbers
116th
Christmas Trees
194th
Collatz
283rd
Day of Week
132nd
Divisors
374th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
118th
Fibonacci
62nd161st
Fizz Buzz
84th657th
Foo Fizz Buzz Bar
266th
Fractions
46th
Happy Numbers
188th
Happy Numbers (Long)
100th
ISBN
56th
Leap Years
401st
Look and Say
69th
Lucky Numbers
79th
Niven Numbers
285th
Niven Numbers (Long)
101st
Odious Numbers
137th
Odious Numbers (Long)
94th
Ordinal Numbers
4th
Pangram Grep
165th
Pascalβs Triangle
74th
Pernicious Numbers
130th
Pernicious Numbers (Long)
80th
Prime Numbers
47th
Prime Numbers (Long)
177th
Quine
1st63rd
Roman to Arabic
95th
Tongue-twisters
94th
Vampire Numbers
60th