context: ###List of Questions
  (1) Solve y = 8*y - y for y.
  (2) Three letters picked without replacement from {g: 2, y: 4, w: 1}. Give prob of sequence ygy.
  (3) In base 3, what is -10 + -2002122?
  (4) How many tonnes are there in 2430.25 milligrams?
  (5) Suppose -2*a = -0*a - 10. What is the remainder when 12 is divided by a?
q_1: (1) Solve y = 8*y - y for y.
q_2: (2) Three letters picked without replacement from {g: 2, y: 4, w: 1}. Give prob of sequence ygy.
q_3: (3) In base 3, what is -10 + -2002122?
q_4: (4) How many tonnes are there in 2430.25 milligrams?
q_5: (5) Suppose -2*a = -0*a - 10. What is the remainder when 12 is divided by a?