Home / Discussions / Arrange the numbers 1-9 in a 3×3 square using each only once

Arrange the numbers 1-9 in a 3×3 square using each only once

Brain Teaser for Engineers

Arrange the numbers 1-9 in a 3×3 square using each once only, according to the following rules:

  • exactly one prime number is directly above a prime number that’s two numbers less;
  • each pair of opposite corners sums to the same square total and exactly two columns share another square total;
  • exactly one prime number is directly to the left of a non-prime number that’s two numbers greater;
  • directly above exactly one square number is a number that’s four numbers greater; and
  • directly to the right of exactly one cubic number is a number that’s one number greater.

EMBED:

Subscribe to be alerted when an answer and a new teaser has been posted.

Your name:
Your answer:
Email:


Two Sand Glasses | Back – Next | An unusual paragraph

About Doug Fred E.I.

Check Also

3 Questions for an Engineer

1. How much does a house weigh? 2. How much weight can a rural two-lane …

10 comments

  1. Does this work too?

    7 8 9
    2 4 5
    1 6 3

Leave a Reply