Rosetta Code Problems

• 100 doors | Rosetta Code | #1

• Proper divisors | Rosetta Code | #2

• Anti-primes | Rosetta Code | #3

• Semiprime | Rosetta Code | #4

• Narcissistic decimal number | Rosetta Code | #5

• Gapful numbers | Rosetta Code | #6

• Humble numbers | Rosetta Code | #7

• Perfect numbers | Rosetta Code | #8

• Pythagorean quadruples | Rosetta Code | #9

• Munchausen numbers | Rosetta Code | #10

• Primorial numbers | Rosetta Code | #11

• Taxicab numbers | Rosetta Code | #12

• Abundant odd numbers | Rosetta Code | #13

• Self-describing numbers | Rosetta Code | #14

• Pernicious numbers | Rosetta Code | #15

• Unprimeable numbers | Rosetta Code | #16

• Happy numbers | Rosetta Code | #17

• Hamming numbers | Rosetta Code | #18

• Palindromic gapful numbers | Rosetta Code | #19

• Esthetic numbers | Rosetta Code | #20

• Magnanimous numbers | Rosetta Code | #21

• Zumkeller numbers | Rosetta Code | #22

• Smith numbers | Rosetta Code | #23

• Fermat numbers | Rosetta Code | #24

• Weird numbers | Rosetta Code | #25