Write a function that calculates the ratio between the sum of the prime numbers less than or equal to x, and the sum of the non-prime numbers up to the greatest prime less than or equal to x.
For example, if x = 7, then:
sum_prime = sum([2 3 5 7]) = 17
sum_non_prime = sum([1 4 6]) = 11
Therefore, the desired ratio is:
prime_ratio = sum_prime / sum_non_prime = 17 / 11
Solution Stats
Problem Comments
3 Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers42
Suggested Problems
-
3975 Solvers
-
930 Solvers
-
951 Solvers
-
Given a matrix, swap the 2nd & 3rd columns
1284 Solvers
-
Create an index-powered vector
966 Solvers
More from this Author11
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
test case #2 is not correct.
The problem description should be change to "and the sum of non-prime numbers up to the greatest prime lower than x".
Thank you for that clarification, @Rafael S.T. Vieira. The problem title and description have been improved, along with added test cases.