### AMS 303 SECOND TEST REVIEW Solutions to Past Tests

Spring 2017 AMS 303 Second Test
1. (4 pts) Test A:(x4)^2; Test B: (x3)^3.
2. (15 pts,3,3,3,6) Test A: a) 3, b) remove 3 from 3rd pile, b) could use pile 2 or 3 or 4- remove 1, d) Gr = 2, remove 4 from pile 4.
Test B: a) 5, b) remove 5 from pile 3, c) could use pile 2 or 3 or 4-- remove 4, d) Gr = 3, could use pile 2 or 3 or 4-- in pile 2, remove 5.
3. (12 pts) Test A: a (-,oo), b(g-,1), c(h-,1), d(a+,1), e(j-,1), f(k-,1), g(c+,1) h(d +,1), i(b+ or f+,1), j(d+,1), k(e+,1), z(i+,1). One new solution using b-i is b-i,
Test B: a (-,oo), b(h-,1), c(g-,1), d(a+,1), e(k-,1), f(j-,1), g(b+,1) h(d+,1), i(c+ or e+,1), j(d+,1), k(f+,1), z(i+,1). One new solution using c-i is b- h, c-i,d-g,e-k,f-j
4. (12 pts) Test A: (1/6)[(x1)^9 + 2(x3)^3 + 3x1(x2)^4], xi = (b^i + w^i);
Test B: (1/6)[(x1)^6 + 2(x3)^2 + 3(x1)^2*(x2)^2], xi = (b^i + w^i).
5. (8 pts) Test A: supplies L 1, T 0, V 3: supplies of wins less than demand of games to be played, impossible:
Test B: supplies L 0, T 0, V 2: supplies less than demands, impossible.
6. (10 pts: 2,2,2,4): Test A: a) x11=20,x21=10,x22=20,x23=10,x33=30, b) u1=10, u2=8, u3=10, v1=14,v2=15,v3=13, c) increase x12, New solution obtained by increasing x12 and x21 by 20, reduce x11 and x22 by 20.
Test B: a) x11=20,x12=10,x22=10,x32=10,x33=30, b) u1=10, u2=11,u3=13, v1=14,v2=17,v3=18, c) increase x13 (or x31), New solution obtained by increasing x13 and x32 by 10, reduce x21 and x32 by 10.

Fall 2016 AMS 303 Second Test
1.(4 pts) : (x sub 8).
2. (12 pts) a (-,oo), b(g-,1), c(i-,1), d(j-,1), e(k-,1), f(a+,1), g(d+,1) h(b+ or c+,1), i(e+,1), j(f+,1), k(f+,1), z(h+,1). One new solution using b-h is b-h, c-i, d-g, e-k, f-j.
3. (15 pts) a) initial digital sum is 011 = 3; b) remove 3 from pile 3; c) remo ve 1 from pile 2 or 3 or 4; d) g(0)=0, g(1)=1, g(2)=0, g(3)=1, g(4)=2, g(5)=3, g(6)=2, g(7) = 0, sum is 2, remove 4 from pile 4.
4. (12 pts) (1/4)[(b+w)^11 + 2(b+w)(b^2+w^2)^5 + (b+w)^3(b^2 + w^2)^4].
5. (8 pts) Possible. Number of available wins (L 2, T 2, V 4). Solution has L beat T twice, T beat L twice, and V beat L and T twice each.
6. (10 pts) Initial solution: x11=20, x21=10, x22=20, x23=10, x33=30. Prices u1=\$10, u2=\$8, u3=\$10,v1=\$14, v2=\$15, v3=\$13. Add x12: increase x12, x21 by 20, decrease x11 and x22 by 20.

Spring 2016 AMS 303 Second Test
1.(4 pts) : (x sub 3)^3.
2. (12 pts) a (-,oo), b(h-,1), c(g-,1), d(i-,1), e(ki-,1), f(a+,1), g(b+,1) h(f+,1), i(f+,1), j(c+ or e+,1), k(d+,1), z(j+,1). One new solution using c-j is b-g, c-j, d-i, e-k, f-h; other is b-h, c-g, d-k, e-j, f-i.
3. (15 pts) a) initial digital sum is 011 = 3; b) remove 1 from pile 3; c) remove 2 from pile 1 or 3 or 4; d) g(0)=0, g(1)=1, g(2)=0, g(3)=1, g(4)=2, g(5)=3, g(6)=2, sum is 1, remove 1 from pile 1.
4. (12 pts) (1/4)[(b+w)^8 +(b^2+w^2)^4 + 2(b+w)^2(b^2 + w^2)^3].
5. (8 pts) Possible. Number of available wins (L 2, T 2, V 3) equals number of games to be played. Many possible solutions.
NOTE that there is an error in the table because it says the Bears have 8 more total games but only 6 games against the Lions, Tigers and Vampires.
6. (10 pts) Initial solution: x11=20, x12=10, x22=20, x23=20, x33=20. Prices u1=\$10, u2=\$8, u3=\$9, v1=\$15, v2=\$14, v3=\$13. Select either x13 or x32. For x31, increase x31, x12, and x23 by 20. and reduce x11, x22, x33 by 20.

Spring 2015 AMS 303 Second Test
1. x sub 10
2. a) digital sum of piles is 011=3, b) remove 3 from pile 3, c) take 1 from pile 3, d) g(0)=0, g(1)=1, g(2)=0, g(3)=1, g(4)=2, g(5)=3, g(6)=2, g(7)=0, sum is 10, remove 4 from pile 1.
3. a (-,oo), b(g-,1), c(h-,1), d(i-,1), e(j-,1), f(a+,1), g(c+) h(f+,1), i(f+,1), j(d+,1), k(b+ or e+,1), z(k+,1). One new solution b-k, c-g, d-i, e-j, f-h)
4.(1/8)[(b+w)^12 + 2(b^4+w^4)^3 + 3(b^2+w^2)^6 + 2(b+w)^2(b^2+w^2)^5].
5. Not possible,L & T play 4 games but they can collectively only win 3 games.
6. Initial solution: x11=30, x21=30, x22=20, x23=10, x33=20. Prices u1=\$10, u2=\$9, u3=\$12, v1=\$15, v2=14, v3=16. Select x13. Increase x13 and x21 by 10, reduce x11 and x23 by 10.