question 1 , there is a boat , loaded 20 monkeys and 40 sheep , the question is , how old is the captain???
question 2 , A man is standing on one spot on the earth , first he walk 100 meters to south , then 400 meters to east , at last 100 meters to north ,and back to the original place , at this time , he sees a bear , the question is ,what's the color of the bear ???