#03: THE MISSING DOLLAR

Three people check into a hotel, pay $30 for a room and immediately get into the room to get refreshed.
But the cost of the room is $25. Thus a bellboy is sent to their room to return the remainder of $5. 
On the way to the room, the bellboy reasons that $5 would be difficult to share among three people. So he pockets $2 and gives $1 to each person.
Now each person had paid $10 and got back $1.
So they paid $9 each- totalling $27.
The bellboy has $2, totalling $29.
Where is the missing $1

SOLUTION:

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#02: A THOUSAND BOTTLES OF WINE

You have 1,000 bottles of wine, and exactly one bottle is poisoned. You need to find the poisoned wine before your party starts in an hour. You have 10 rats to test on to find out which bottle is deadly. The poison takes effect after an hour of consumption, so you only have one chance to run your rat poison experiment, meaning you can’t feed some rats wine and wait an hour before feeding them more wine. Assume each rat can drink as much wine as you feed it. How do you find the poisoned wine?

SOLUTION

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#01:THE THREE LIGHT BULBS

 

 In your cellar there are three light switches in the OFF position. Each switch controls 1 of 3 light bulbs on the floor above. You may move any of the switches but you may only go upstairs to inspect the bulbs once. How can you find the switch for each bulb with one inspection??

SOLUTION

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Christmas style Paper Circuits!

We had a paper circuits workshop in December, and of course, we went with the Christmas theme! The group of bright young creative students all made christmas ornaments that light…

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Workshop at St Francis Xavier School

I did a workshop with St Francis Xavier. The girls were entusiastic and eager to learn. They all completed the workshop successfully, and enjoyed themselves immensely. In their words it…

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