Puzzle:
Find a positive integer (base 10) which has the following four properties:
Find a positive integer (base 10) which has the following four properties:
- Each of the 10 digits (0 to 9) appears exactly once in the number.
- For each pair of digits whose sum is 9, the number of other digits positioned strictly between the pair is equal to the smaller digit of the pair.
- The sum of each pair of digits positioned at the same distance from opposite ends of the number is a prime number.
- The difference between any 2 adjacent digits is greater than 1.
3 comments:
5831746290
u said the difference shud be a prime.. but 1 is neither prime nor composite...
Post a Comment