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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.

See The Solution Submitted by Charlie    
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  Subject Author Date
re: p&p solnCharlie2018-10-24 16:21:53
p&p solnSteven Lord2018-10-23 11:24:39
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