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# Three switches and a closed door

A good riddle is one that really makes you think.

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again.

How can you definitively tell which switch is connected to each of the light bulbs?

Turn on the first two switches. Leave them on for five minutes. Once five minutes has passed, turn off the second switch, leaving one switch on. Now go through the door. The light that is still on is connected to the first switch. Whichever of the other two is warm to the touch is connected to the second switch. The bulb that is cold is connected to the switch that was never turned on.

## Who was it?

A rich man named Stuart Laidlaw had been counting his money. When he finished, he accidentally left a \$1000.00 bill on his desk but when he returned for it a short while later, it was gone. Only two other persons could have seen the bill. One was the cook; the other...

## How many cartons did he ship?

Hard riddles like this brainteaser are tricky because they seem to invite straightforward, logical thinking.A merchant can place 8 large boxes or 10 small boxes into each carton for shipping. In one shipment, he sent a total of 96 boxes. If there are more large boxes...

## Name a thing

Solving hard riddles and brain teasers is one of the best tried and tested ways to exercise your brain since the times of our ancestors.Name a thing that is produced in the sea and resides in your home.A thumb.more...

## Reflections

The letters on the glass doors of a beauty parlor read correctly when viewed from the street. How would this lettering appear when seen in a mirror in the parlor, which reflects it from a mirror, which reflects it from another mirror?The lettering would appear...