In the year 1888, Ernst von Haselberg published the Magic Hexagon problem for the first time:
"In the following hexagon, can we place the numbers 1 to 19, such that the sum on every straight line in any direction (with 3, 4 or 5 numbers) is always 38?”

                     


To help in solving this problem, try the hexagon below.
Seven of the numbers have been positioned for you.