12 Days of Christmas
557
99 Bottles of Beer
666
Abundant Numbers
755
Arabic to Roman
483
Christmas Trees
785
Divisors
884
Emirp Numbers
525
Evil Numbers
643
Fibonacci
942
Fizz Buzz
782
Foo Fizz Buzz Bar
732
Happy Numbers
548
Leap Years
818
Niven Numbers
907
Odious Numbers
657
Ordinal Numbers
667
Pangram Grep
781
Pascal’s Triangle
607
Pernicious Numbers
653
Prime Numbers
720
Roman to Arabic
667
Seven Segment
453
Spelling Numbers
United States
246
λ
215
π
139
τ
136
φ
100
√2
86
𝑒
120