The answer to last week’s challenge is Q: After teaching his class all about roman numerals (X=10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The only stipulation the teacher made was that the pen could not be lifted from the paper until the line was complete. Can you do it?

A: Draw an S in front of the IX and it spells SIX. (The line need not be straight).

This week’s thinking challenge is …

Q: You are on an island in the middle of a lake. The lake is in a remote part of the country and there has never been a bridge connecting the island to the mainland. Every day a tractor and wagon gives hay rides around the island. Puzzled as to how the tractor had gotten onto the island, you ask around and find out that the tractor was not transported to the island by boat or by air. Nor was it built on the island. Can you explain how the tractor got there?

We are pleased to announce that we have now locked in our next Six Thinking Hats public training session for Melbourne on July 26.

Registration details Here.

The answer to today’s “mental floss” will appear next week along with a new thinking challenge.

Enjoy the weekend!