12 Days of Christmas
338th
Christmas Trees
281st
Divisors
81st
Emirp Numbers
69th
Evil Numbers
140th
116th
Fibonacci
263rd1,658th
Fizz Buzz
1st
Happy Numbers
68th
Leap Years
233rd
Niven Numbers
1st
Odious Numbers
113th
Pangram Grep
91st
Pascalβs Triangle
94th
Pernicious Numbers
66th
Prime Numbers
114th
Seven Segment
71st