All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Numbers
Chain of Primes (Posted on 2018-10-23) Difficulty: 3 of 5
Find the 6-digit number with no zeros where:
  • No digit appears more than once.
  • The sum of the last four digits equals twice the sum of the first two.
  • The first two digits form a prime number when concatenated.
  • Digits 2 and 3 also form a prime.
  • Digits 3 and 4 also form a prime.
  • Digits 4 and 5 also form a prime.
  • Digit 5 itself is also a prime.
  • All six digits add up to 33.
The last two digits need not form a prime.
From Mensa Puzzle Calendar 2018 by Fraser Simpson, Workman Publishing, New York. Puzzle for October 9.

  Submitted by Charlie    
No Rating
Solution: (Hide)
831975

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re: No Subjecttonny ken2019-06-29 01:22:51
re: No Subjectbhole2019-03-14 12:26:32
No Subjectnaomiprice2019-01-23 20:45:36
re: p&p solnCharlie2018-10-24 16:21:53
p&p solnSteven Lord2018-10-23 11:24:39
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (1)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (6)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2024 by Animus Pactum Consulting. All rights reserved. Privacy Information