Use 3 separate lines (straight or curved) to join the boxes labeled with letters; a single line for each to join “A” to “A”, “B” to “B” and “C” to “C”. The lines cannot touch or cross each other. They must stay inside the (black lines of the) diagram, and cannot touch the sides. They cannot touch or go through other boxes. There’s no trick involved.

Lateral thinking demonstration


Over a lifetime, your thought process has been conditioned, or “blinkered”. You probably couldn’t solve the puzzle because of two deeply entrenched teachings:

  1. “A” comes before “B” and “C; and
  2. The shortest distance between two points is a straight line.

SEE the solution HERE