context: ###List of Questions
  (1) Three letters picked without replacement from ieuiueiieeee. What is prob of sequence eii?
  (2) Suppose -3*r - 2*b = -10, -2*r - 2*b + 7 = -b. What is the units digit of r?
  (3) What is twenty-one fifths of a millennium in years?
  (4) Solve 0 = -4*v + 2*z + 18, 4 = 3*v + z - 7 for v.
  (5) Evaluate (1/2)/(17/170).
q_1: (1) Three letters picked without replacement from ieuiueiieeee. What is prob of sequence eii?
q_2: (2) Suppose -3*r - 2*b = -10, -2*r - 2*b + 7 = -b. What is the units digit of r?
q_3: (3) What is twenty-one fifths of a millennium in years?
q_4: (4) Solve 0 = -4*v + 2*z + 18, 4 = 3*v + z - 7 for v.
q_5: (5) Evaluate (1/2)/(17/170).