Magic Numbers

Identify or generate numbers belonging to named sets such as Rational, Armstrong, and Fibonacci.

Magic Numbers Master

+50 points

Problem Title	Likes	Solvers
Problem 2819. Find the 9's Complement Created by: Pritesh Shah Tags matlab	3	217
Problem 2734. N-th Odious Created by: Jan Orwat Tags number theory, oeis, pop series	1	119
Problem 2733. Evil Number Created by: Jan Orwat Tags easy, number theory, oeis	2	211
Problem 2690. Armstrong Number Created by: VIVEK RUHELA Tags arithmetic, basic matlab	4	244
Problem 2674. Generalised Hamming Number Created by: Jean-Marie Sainthillier Tags hamming	7	103
Problem 2595. Polite numbers. Politeness. Created by: Jan Orwat Tags number theory, oeis	5	103
Problem 2593. Polite numbers. N-th polite number. Created by: Jan Orwat Tags number theory, a138591	2	114
Problem 2248. Bell Number calculator Created by: robin Tags sets, partition	2	117
Problem 2061. Narcissistic number ? Created by: Jean-Marie Sainthillier Tags narcissistic	2	242
Problem 2056. Is this number Munchhausen Narcissistic? Created by: Ted Tags math, narcissistic number, munchhausen	2	145
Problem 1997. Compute Fibonacci Number Created by: Alexander Tags numbers, fibonacci	3	321
Problem 1925. Smith numbers Created by: Sky Sartorius Tags sum, factors	4	194
Problem 1826. Find vampire numbers Created by: Andrew Newell Tags factors, number theory	6	141
Problem 1771. Polygonal numbers Created by: Jan Orwat Tags number theory, sequence, polygonal	3	91
Problem 1742. Generate a Parasitic Number Created by: James Tags parasitic, cyclic	2	64
Problem 1472. nth Rational Number Created by: G K Tags math	1	130
Problem 166. Kaprekar numbers Created by: the cyclist Tags kaprekar	2	209
Problem 156. Parasitic numbers Created by: the cyclist Tags parasitic	3	265
Problem 139. Determine if a Given Number is a Triangle Number Created by: @bmtran (Bryant Tran) Tags triangle numbers	6	361

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