top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Find a way to write digits 1 through 9 in sequence, so that any two consecutive digits are divisible either by 7 or 13.

+1 vote
118 views

Find a way to write the digits 1 through 9 in sequence, so that the numbers determined by any two consecutive digits are divisible either by 7 or by 13.

posted Apr 13, 2019 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

784913526


78 84 49 91 13 35 52 26 are all divisible either by 7 or by 13
see picture below for calculation method and steps leading to given result. 7 was chosen as starting number as any 2-digit number divisible by 7 or 13 is not ending with 7 (except 77 which can't be included)


red fonts indicate duplication of digits where caculation line ends
enter image description here

answer Apr 14, 2019 by Hanifa Mammadov
...