Riddle Me This

A Petri dish hosts a healthy colony of bacteria. Once a minute every bacterium divides into two. The colony was founded by a single cell at noon. At exactly 12:43 (43 minutes later) the Petri dish was half full.
At what time will the dish be full?

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You have a 5 gallon bucket and a 3 gallon bucket with as much water as you need, but no other measuring devices. Fill the 5 gallon bucket with exactly 4 gallons of water.

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What has hands but can not clap?

Clock

Except the digital versions

A girl is sitting in a house at night that has no lights on at all. There is no lamp, no candle, nothing. Yet she is reading

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Braille

How many months have 28 days?

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All

You have a 5 gallon bucket and a 3 gallon bucket with as much water as you need, but no other measuring devices. Fill the 5 gallon bucket with exactly 4 gallons of water.

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Fill the 5 gallon

From the 5 gallon fill the 3 gallon

Tip out the 3 gallon

Put the 2 gallon remain in the 5 gallon into the 3 gallon

Fill up the 5 gallon

Top up the 3 gallon from the 5 gallon

Unless you have been sloppy congratulations you have 4 gallon left in the 5 gallon

:)
 
Clock

Except the digital versions



Braille



All



Fill the 5 gallon

From the 5 gallon fill the 3 gallon

Tip out the 3 gallon

Put the 2 gallon remain in the 5 gallon into the 3 gallon

Fill up the 5 gallon

Top up the 3 gallon from the 5 gallon

Unless you have been sloppy congratulations you have 4 gallon left in the 5 gallon

:)

Yes!

Wonder if someday the clock riddle won't work.

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Cats when dropped land feet first

Buttered toast when dropped lands butterside down

Strap buttered toast (butter side up) to the back of a cat and drop

Do they ever hit the floor of just keep spinning?

QI S 9 EP 8 Hypothetical

:)
 
A Petri dish hosts a healthy colony of bacteria. Once a minute every bacterium divides into two. The colony was founded by a single cell at noon. At exactly 12:43 (43 minutes later) the Petri dish was half full.
At what time will the dish be full?

<>
12.44 by the exponential function.
 
Cats when dropped land feet first

Buttered toast when dropped lands butterside down

Strap buttered toast (butter side up) to the back of a cat and drop

Do they ever hit the floor of just keep spinning?

QI S 9 EP 8 Hypothetical

:)
Perpetual motion!
 
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