12 Days of Christmas
557
99 Bottles of Beer
666
Abundant Numbers
749
Arabic to Roman
481
Christmas Trees
779
Divisors
875
Emirp Numbers
521
Evil Numbers
641
Fibonacci
938
Fizz Buzz
780
Foo Fizz Buzz Bar
731
Happy Numbers
545
Leap Years
813
Niven Numbers
898
Odious Numbers
653
Ordinal Numbers
667
Pangram Grep
774
Pascal’s Triangle
604
Pernicious Numbers
649
Prime Numbers
719
Roman to Arabic
660
Seven Segment
448
Spelling Numbers
United States
245
λ
215
π
138
τ
136
φ
100
√2
85
𝑒
119