Mental Floss 103










The answer to last week’s challenge is Q: There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way. Where can you place an apple so that all but one person can see it?

A: Place the apple on top of one person’s head.

This week’s challenge is …

Q: One family wants to get through a tunnel at night. Dad can make it in 1 minute, mom in 2 minutes, son in 4 minutes and daughter in 5 minutes. Unfortunately, not more than two people can go through the narrow tunnel at one time, moving at the speed of the slower one. They have only one torch and it only has enough light left for 12 minutes. The tunnel is too dangerous to cross without a torch. How can they all cross the tunnel in 12 minutes?

The answer along with a new challenge, next week.

Enjoy the weekend!



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About the Author

Frank Connolly is the Principal of “Think Quick”, a business that adds value through thinking differently. His work history covers all sectors and includes initiatives that have yielded bottom line benefit in the 10’s of millions of dollars.

Current clients range from Exxon-Mobil to Government Depts within Australia to Global NGO’s.

Much of his working life has been split between Australia, the South Pacific and Asia where he has trained and facilitated Lateral Thinking techniques, and been acknowledged by Edward de Bono as one of the foremost practitioners of the de Bono thinking methods worldwide.

Frank believes strongly that if we can improve the way we think, the actions that follow also improve.


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