1.  “I guarantee”, said the pet salesman, “that this parrot will repeat every word it hears.”  A customer bought the parrot but found it would not speak a single word.  Nevertheless, the salesman told the truth.  Can you explain?
2.  Find the sum of the reciprocals* of all the whole-number factors of 24.          *  1/2 is the reciprocal of 2, e.g.
3.  What is the largest three-digit number divisible by both 7 & 9?
4.  If a jar of peanut butter that is 3 inches in diameter and 4 inches high sells for 60 cents (ha!), what is a fair price for a jar that is 6 inches in diameter and 6 inches high?