12 Days of Christmas
557
99 Bottles of Beer
665
Abundant Numbers
753
Arabic to Roman
482
Christmas Trees
783
Divisors
884
Emirp Numbers
525
Evil Numbers
642
Fibonacci
940
Fizz Buzz
782
Foo Fizz Buzz Bar
731
Happy Numbers
547
Leap Years
827
Niven Numbers
906
Odious Numbers
656
Ordinal Numbers
666
Pangram Grep
780
Pascal’s Triangle
607
Pernicious Numbers
652
Prime Numbers
720
Roman to Arabic
667
Seven Segment
452
Spelling Numbers
United States
246
λ
214
π
138
τ
136
φ
100
√2
85
𝑒
120