Yesterday’s Problem:
A woman owns ten female dogs. Everyone of the dogs has had a puppy and none has had as many as ten. Does that mean that at least two of the dogs have had the same number of puppies?
Answer:
Yes
Today’s Problem:
A single amoeba in a beaker can divide into two in one minute. After another minute, each of those two amoebas split, leaving four amoebas. At the end of forty minutes, the beaker is full.
How many minutes did it take for the beaker to be half full of amoebas?