12 Days of Christmas
40th
99 Bottles of Beer
41st
Arabic to Roman
17th
Christmas Trees
52nd
Diamonds
34th
Divisors
38th
Emirp Numbers
110th
Evil Numbers
61st
Fibonacci
108th
Fizz Buzz
70th
Happy Numbers
52nd
Leap Years
28th
Niven Numbers
38th
Odious Numbers
56th
Pangram Grep
33rd
Pascalβs Triangle
1st
Pernicious Numbers
85th
Prime Numbers
80th
Seven Segment
21st