12 Days of Christmas
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Ascending Primes
Catalan Numbers
Christmas Trees
Collatz
Day of Week
Divisors
Evil Numbers
Evil Numbers (Long)
Farey Sequence
Fibonacci
5,877th1,081st
Fizz Buzz
6,502nd2,230th
Foo Fizz Buzz Bar
Fractions
Happy Numbers
Happy Numbers (Long)
ISBN
Leap Years
Look and Say
Lucky Numbers
Niven Numbers
Niven Numbers (Long)
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
Pangram Grep
Pascalβs Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Prime Numbers
Prime Numbers (Long)
Quine
240th698th
Roman to Arabic
Tongue-twisters
Vampire Numbers