context: ###List of Questions
  (1) How many months are there in 6/5 of a century?
  (2) What is next in -3496, -3491, -3482, -3469?
  (3) In base 14, what is -4ac2 - -3?
  (4) Suppose 3*b + 7 = 19. Suppose 2*a - b*a = -6. Calculate the remainder when 5 is divided by a.
  (5) Two letters picked without replacement from {a: 4, e: 1, t: 3, s: 1, h: 4}. What is prob of picking 1 t and 1 e?
q_1: (1) How many months are there in 6/5 of a century?
q_2: (2) What is next in -3496, -3491, -3482, -3469?
q_3: (3) In base 14, what is -4ac2 - -3?
q_4: (4) Suppose 3*b + 7 = 19. Suppose 2*a - b*a = -6. Calculate the remainder when 5 is divided by a.
q_5: (5) Two letters picked without replacement from {a: 4, e: 1, t: 3, s: 1, h: 4}. What is prob of picking 1 t and 1 e?