Problems

1 – 11 of 11

Problem Title Likes Solvers Difficulty

Problem 2061. Narcissistic number ?

Created by: Jean-Marie Sainthillier

Tags narcissistic

274

Problem 2690. Armstrong Number

Created by: VIVEK RUHELA

Tags arithmetic, basic matlab

273

Problem 156. Parasitic numbers

Created by: the cyclist

Tags parasitic

265

Problem 2593. Polite numbers. N-th polite number.

Created by: Jan Orwat

Tags number theory, a138591

137

Problem 2056. Is this number Munchhausen?

Created by: Ted

Tags math, narcissistic number, munchhausen

159

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

225

Problem 166. Kaprekar numbers

Created by: the cyclist

Tags kaprekar

252

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

130

Problem 1925. Smith numbers

Created by: Sky Sartorius

Tags sum, factors

468

Problem 1742. Generate a Parasitic Number

Created by: James

Tags parasitic, cyclic

Problem 1826. Find vampire numbers

Created by: Andrew Newell

Tags factors, number theory

275

1 – 11 of 11

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Problem Groups

Difficulty Rating

Problem Groups

Problems

Problem 2061. Narcissistic number ?

Problem 2690. Armstrong Number

Problem 156. Parasitic numbers

Problem 2593. Polite numbers. N-th polite number.

Problem 2056. Is this number Munchhausen?

Problem 2733. Evil Number

Problem 166. Kaprekar numbers

Problem 2595. Polite numbers. Politeness.

Problem 1925. Smith numbers

Problem 1742. Generate a Parasitic Number

Problem 1826. Find vampire numbers