12 Days of Christmas
12th
Abundant Numbers
217th
Abundant Numbers (Long)
164th
Arabic to Roman
72nd
Arithmetic Numbers
141st
Ascending Primes
98th
Catalan Numbers
134th
Christmas Trees
253rd
Collatz
347th
Day of Week
173rd
Divisors
424th
Evil Numbers
1st
Evil Numbers (Long)
40th
Farey Sequence
141st
Fibonacci
66th188th
Fizz Buzz
88th135th
Foo Fizz Buzz Bar
102nd
Fractions
41st
Happy Numbers
231st
Happy Numbers (Long)
136th
ISBN
108th
Leap Years
437th
Look and Say
44th
Lucky Numbers
103rd
Niven Numbers
318th
Niven Numbers (Long)
132nd
Odious Numbers
155th
Odious Numbers (Long)
110th
Ordinal Numbers
87th
Pangram Grep
211th
Pascal’s Triangle
45th
Pernicious Numbers
147th
Pernicious Numbers (Long)
104th
Prime Numbers
56th
Prime Numbers (Long)
230th
Quine
1st72nd
Roman to Arabic
130th
Tongue-twisters
164th
Vampire Numbers
91st