Problem 46050. Construct a prime circle

• Created by ChrisR
• Appears in Lights Out

×

Like (7)

Difficulty:

(503)

Rate

• Solve Later   
• Add To GroupÂ

A prime circle is a circular arrangement of the numbers 1 to such that pairs of consecutive numbers add to primes. For example, if n = 3, a valid prime circle would be

1 6 5 2 3 4

because the sums of pairs would be 7, 11, 7, 5, 7, and (wrapping around) 5--all of which are prime.

Write a function to create a prime circle given n. The test suite will check that prime circle has the right numbers and that the sums of pairs are prime.

Solve

Solution Stats

31.61% Correct | 68.39% Incorrect

• 155 Solutions
• 39 Solvers

Last Solution submitted on Jun 19, 2025

Last 200 Solutions

Solution Comments

Problem Recent Solvers39

Suggested Problems

• Making change

  3426 Solvers

• Finding peaks

  429 Solvers

• Area of an equilateral triangle

  6522 Solvers

• Numbers spiral diagonals (Part 1)

  210 Solvers

• Convert radians to degrees

  2069 Solvers

More from this Author303

• Compute the dispersion coefficient

  4 Solvers

• Compute head profiles for steady 1D flow through soils in series

  1 Solvers

• Find jumping medalists

  17 Solvers

• Compute the period of a pendulum started from a finite initial angle

  3 Solvers

• Evaluate the generalized hypergeometric function

  5 Solvers