Brain Teasers
Amoebas
Amoebas reproduce by splitting in two. An amoeba which does so every minute is placed in a jar at exactly ten o`clock in the morning. At 12:00 noon the jar is full. At what time is the jar half full?
Answer
11:59. Since they double every minute, at 11:59 it was half full. One minute later it had doubled and was full.Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments hidden to avoid spoilers.
Follow Braingle!