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Unformatted text preview: _______ 13. It is not possible for both n ≡ 4 mod 20 and n ≡ 12 mod 20. _______ 14. There is no regular solid (Platonic solid) with faces consisting of hexagons. _______ 15. ϕ (2 4 3 2 5) = 240 16. (5 pts) Describe Adler’s attitude regarding the quality of teaching in mathematics classes. 17. (10 pts) Describe how you would calculate the Euler number of a cube. 18. (10 pts) How can you write 6 in two different ways as a product of prime nimbers? How do you know the factors you use are prime? 19. (10 pts) What property of public key cryptography makes it such a difficult system to break? 20. (15 pts) Find the least nonnegative residue of each of the following. Show your work. 15 15 mod 13 (69)(352)(45) mod 35 51 82 mod 44 21. (10 pts) Find an integer x that solves the congruence 17x ≡ 4 mod 7. Show your work....
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This note was uploaded on 07/06/2011 for the course M 310P taught by Professor Vick during the Spring '11 term at University of Texas.
 Spring '11
 Vick
 Math

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