12 Days of Christmas
7th
99 Bottles of Beer
7th
Abundant Numbers
5th
Arabic to Roman
6th
Christmas Trees
9th
Diamonds
8th
Divisors
10th
Emirp Numbers
7th
Evil Numbers
14th
Fibonacci
12th
Fizz Buzz
778th1st
Happy Numbers
1st
Leap Years
8th
Leyland Numbers
6th
Morse Decoder
6th
Morse Encoder
6th
Niven Numbers
1st
Odious Numbers
14th
Ordinal Numbers
15th
Pangram Grep
1st
Pascal’s Triangle
1st
Pernicious Numbers
32nd
Prime Numbers
22nd
Quine
1st
77th103rd
Roman to Arabic
Seven Segment
6th
Sierpiński Triangle
4th
Spelling Numbers
6th
π
τ
φ
𝑒
9th