Cody

Problems

1 – 10 of 10
Problem Title
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Difficulty

Problem 1925. Smith numbers

Created by: Sky Sartorius

Tags sum, factors

4

249

Problem 365. Numbers with prime factors 2, 3 and 5.

Created by: elias GR

Tags primes, factors

3

179

Problem 1826. Find vampire numbers

Created by: Andrew Newell

Tags factors, number theory

9

149

Problem 656. Calculate Euler's phi function

Created by: Freddy

Tags math, basic matlab, factors

1

74

Problem 1804. Fangs of a vampire number

Created by: Andrew Newell

Tags factors, number theory

4

65

Problem 3075. Matrix of Multiplication Facts

Created by: James

Tags matrix, factors, elementary_school_math

9

55

Problem 1825. Find all vampire fangs

Created by: Andrew Newell

Tags factors, number theory

2

47

Problem 44229. How brilliant are you?

Created by: James

Tags factors, number theory, brilliant

3

38

Problem 44862. Ratio between sum of primes and sum of factors

Created by: Jesús Zambrano

Tags primes, factors, ratio

0

25

Problem 577. Repopulate the City

Created by: Ned Gulley

Tags factors

4

22
1 – 10 of 10