12 Days of Christmas
557
99 Bottles of Beer
665
Abundant Numbers
754
Arabic to Roman
483
Christmas Trees
784
Divisors
884
Emirp Numbers
525
Evil Numbers
643
Fibonacci
941
Fizz Buzz
782
Foo Fizz Buzz Bar
732
Happy Numbers
548
Leap Years
827
Niven Numbers
907
Odious Numbers
656
Ordinal Numbers
667
Pangram Grep
780
Pascal’s Triangle
607
Pernicious Numbers
652
Prime Numbers
720
Roman to Arabic
667
Seven Segment
453
Spelling Numbers
United States
246
λ
215
π
139
τ
136
φ
100
√2
85
𝑒
120