12 Days of Christmas
45th
Abundant Numbers
149th
Abundant Numbers (Long)
122nd
Arabic to Roman
17th
Arithmetic Numbers
112th
Ascending Primes
62nd
Catalan Numbers
121st
Christmas Trees
199th
Collatz
300th
Day of Week
137th
Divisors
380th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
126th
Fibonacci
62nd173rd
Fizz Buzz
86th669th
Foo Fizz Buzz Bar
272nd
Fractions
46th
Happy Numbers
191st
Happy Numbers (Long)
103rd
ISBN
59th
Leap Years
410th
Look and Say
69th
Lucky Numbers
80th
Niven Numbers
292nd
Niven Numbers (Long)
106th
Odious Numbers
145th
Odious Numbers (Long)
100th
Ordinal Numbers
4th
Pangram Grep
170th
Pascal’s Triangle
75th
Pernicious Numbers
136th
Pernicious Numbers (Long)
84th
Prime Numbers
49th
Prime Numbers (Long)
185th
Quine
1st65th
Roman to Arabic
99th
Tongue-twisters
96th
Vampire Numbers
60th