12 Days of Christmas
541
99 Bottles of Beer
666
Abundant Numbers
750
Arabic to Roman
473
Christmas Trees
756
Divisors
875
Emirp Numbers
522
Evil Numbers
641
Fibonacci
938
Fizz Buzz
780
Foo Fizz Buzz Bar
728
Happy Numbers
545
Leap Years
813
Niven Numbers
899
Odious Numbers
653
Ordinal Numbers
666
Pangram Grep
758
Pascal’s Triangle
605
Pernicious Numbers
650
Prime Numbers
719
Roman to Arabic
662
Seven Segment
449
Spelling Numbers
United States
244
λ
179
π
137
τ
135
φ
100
√2
85
𝑒
120