Cody

Problems

1 – 36 of 36
Problem Title
Likes
Solvers
Difficulty

Problem 1012. Determine if input is a perfect number

Created by: Binbin Qi

Tags mod sum, perfect

2

193

Problem 896. Sophie Germain prime

Created by: Aurelien Queffurust

Tags prime, primes, sophie germain

3

468

Problem 2061. Narcissistic number ?

Created by: Jean-Marie Sainthillier

Tags narcissistic

2

298

Problem 45253. Pell numbers

Created by: Asif Newaz

Tags number, sequence, pell

2

47

Problem 45223. find nth even fibonacci number

Created by: Asif Newaz

Tags series, number, fibonacci

1

52

Problem 45250. Be happy

Created by: Asif Newaz

Tags number, happy

2

23

Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

1

76

Problem 156. Parasitic numbers

Created by: the cyclist

Tags parasitic

4

275

Problem 2690. Armstrong Number

Created by: VIVEK RUHELA

Tags arithmetic, basic matlab

7

279

Problem 44385. Extra safe primes

Created by: Matthew Eicholtz

Tags prime numbers, cody5, safe prime

11

708

Problem 44836. Iccanobif numbers 1

Created by: James

Tags fibonacci, iccanobif

3

54

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

3

235

Problem 2056. Is this number Munchhausen?

Created by: Ted

Tags math, narcissistic number, munchhausen

3

175

Problem 44360. Pentagonal Numbers

Created by: goc3

Tags series, number, sequence

11

630

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

Created by: Jan Orwat

Tags number theory, a138591

2

147

Problem 1096. Largest Twin Primes

Created by: Des Mc Manus

Tags primes

2

402

Problem 165. Woodall number

Created by: the cyclist

Tags woodall number theory

1

148

Problem 166. Kaprekar numbers

Created by: the cyclist

Tags kaprekar

4

262

Problem 45229. Bell Triangle

Created by: Asif Newaz

Tags number, matrix, Magic Numbers

1

33

Problem 525. Mersenne Primes

Created by: Drew Weymouth

Tags math, prime, integers

4

448

Problem 1804. Fangs of a vampire number

Created by: Andrew Newell

Tags factors, number theory

4

78

Problem 45249. Frugal number

Created by: Asif Newaz

Tags number, frugal, economical

2

32

Problem 1082. Lychrel Number Test (Inspired by Project Euler Problem 55)

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15

1

80

Problem 45194. Cantor counting

Created by: Asif Newaz

Tags cantor, rational number

3

25

Problem 933. Ordinal numbers

Created by: Tim

Tags ordinal, lookup table

1

235

Problem 1190. Golomb's self-describing sequence (based on Euler 341)

Created by: James

Tags projecteuler, self-referential, golomb sequence

3

139

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

7

145

Problem 1477. Champernowne Constant

Created by: G K

Tags math

2

66

Problem 249. Project Euler: Problem 9, Pythagorean numbers

Created by: Doug Hull

Tags projecteuler

6

827

Problem 1825. Find all vampire fangs

Created by: Andrew Newell

Tags factors, number theory

2

53

Problem 1925. Smith numbers

Created by: Sky Sartorius

Tags sum, factors

4

492

Problem 74. Balanced number

Created by: Cody Team

Tags matlab

21

2550

Problem 45251. Last non-zero digit

Created by: Asif Newaz

Tags number, factorial

1

27

Problem 1095. Circular Primes (based on Project Euler, problem 35)

Created by: James

Tags primes, projecteuler, circular reasoning

7

296

Problem 235. Project Euler: Problem 4, Palindromic numbers

Created by: Doug Hull

Tags projecteuler

8

764

Problem 81. Mandelbrot Numbers

Created by: Cody Team

Tags matlab, fractals

13

1302
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