G.14 Four Fours Write the numbers from 1 to 100 (inclusive) using exactly four fours. See Problem 60, Problem Set 4.3, x-ref ok to help you get started.
G.15 Pythagorean Theorem Write out three different proofs of the Pythagorean theorem.
G.16 Modular Art Many interesting designs such as those shown here can be created using patterns based on modular arithmetic. Prepare a report for class presentation based on the article "Using Mathematical Structures to Generate Artistic Designs" by Sonia Forseth and Andrea Price Troutman, The Mathematics Teacher, May 1974, pp. 393-398. Another source is "Mod Art: The Art of Mathematics" by Susan Morris, Technology Review, March/April 1979.
G.17
