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? <>
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 <>
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. <>
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 Please Register or Log in to view the hidden image!
When every time piece is digital or a egg timer with 3 minutes of sand Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image! The question then becomes what works upside down the same as right way up Please Register or Log in to view the hidden image!
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 Please Register or Log in to view the hidden image!