12 Days of Christmas
10th
Abundant Numbers
203rd
Abundant Numbers (Long)
147th
Arabic to Roman
70th
Arithmetic Numbers
128th
Ascending Primes
80th
Catalan Numbers
121st
Christmas Trees
235th
Collatz
321st
Day of Week
152nd
Divisors
408th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Farey Sequence
134th
Fibonacci
62nd166th
Fizz Buzz
85th125th
Foo Fizz Buzz Bar
91st
Fractions
33rd
Happy Numbers
218th
Happy Numbers (Long)
122nd
ISBN
100th
Leap Years
417th
Look and Say
36th
Lucky Numbers
97th
Niven Numbers
301st
Niven Numbers (Long)
118th
Odious Numbers
143rd
Odious Numbers (Long)
98th
Ordinal Numbers
84th
Pangram Grep
193rd
Pascal’s Triangle
41st
Pernicious Numbers
135th
Pernicious Numbers (Long)
88th
Prime Numbers
49th
Prime Numbers (Long)
209th
Quine
1st63rd
Roman to Arabic
119th
Tongue-twisters
150th
Vampire Numbers
82nd