IBM Ponder This #005 · September 1998

Draw a standard six-pointed Star of David. Its six straight lines contain twelve vertices in all, with four vertices on each line.

Place the numbers

$$1,2,\dots ,12$$

on the twelve vertices, using every number exactly once. Require that the four numbers on every one of the six lines have sum $26$:

$$\boxed{{\displaystyle \text{sum on each line}=26}}.$$

Solution

Best opened after a real attempt

Solution

To be added.