A fellow encountered a bear in a wasteland. Both got frightened - fellow ran to the north, bear to the west. Suddenly the fellow stopped, aimed his gun to the south and shot the bear.
What colour was the bear?
A teacher thinks of two consecutive numbers between 1 and 10. The first student knows one number and the second student knows the second number. The following exchange takes place:
First: I do not know your number.
Second: Neither do I know your number.
First: Now I know.
What are the 4 solutions of this easy number puzzle?