- "At a party there were 14 adults, 17 children, 12 males and 19 females."
- "Then I arrived at the party and the number of different man-woman couples possible became equal to the number of different boy-girl couples possible. (For example, if there were 5 men and 7 women at the party, then there would have been 5*7 or, 35 possible man-woman couples.)"