12 Days of Christmas
20th15th
6th162nd12th
Abundant Numbers
40th16th243rd53rd17th887th25th
Abundant Numbers (Long)
34th17th133rd41st17th470th18th
Arithmetic Numbers
12th13th124th37th15th452nd14th
Arrows
6th7th
6th8th76th7th
ASCII Table
20th
88th23rd11th301st12th
Collatz
42nd18th261st28th15th485th11th
Divisors
33rd19th361st85th22nd1,272nd49th
Evil Numbers
44th15th62nd30th18th151st12th
Evil Numbers (Long)
40th11th44th22nd8th174th7th
Farey Sequence
11th
Fibonacci
79th37th318th157th
946th23rd
Fizz Buzz
72nd27th1,146th225th51st1,780th71st
Leap Years
34th10th227th31st5th187th9th
Niven Numbers
44th27th204th40th
293rd33rd
Niven Numbers (Long)
37th16th138th18th18th392nd16th
Odious Numbers
43rd15th55th29th15th114th13th
Odious Numbers (Long)
40th11th39th23rd8th95th7th
Pascal’s Triangle
23rd14th131st15th9th464th15th
Pernicious Numbers
36th7th50th25th1st81st22nd
Prime Numbers
47th
39th24th351st31st
Prime Numbers (Long)
32nd
123rd26th10th202nd17th