context: ###List of Questions
  (1) How many millilitres are there in 18/5 of a litre?
  (2) What is the value of (-1)/(-3)*9/6?
  (3) Calculate prob of sequence oqv when three letters picked without replacement from {o: 1, v: 2, q: 1}.
  (4) What is the next term in 477, 954, 1431, 1908?
  (5) Let p be 1 + 0 - 0 - -1. Suppose -36 = 3*o - 5*o - 4*c, -5*o = p*c - 82. Suppose v - 188 = -4*v + 3*g, -o = -4*g. What is the remainder when v is divided by 21?
q_1: (1) How many millilitres are there in 18/5 of a litre?
q_2: (2) What is the value of (-1)/(-3)*9/6?
q_3: (3) Calculate prob of sequence oqv when three letters picked without replacement from {o: 1, v: 2, q: 1}.
q_4: (4) What is the next term in 477, 954, 1431, 1908?
q_5: (5) Let p be 1 + 0 - 0 - -1. Suppose -36 = 3*o - 5*o - 4*c, -5*o = p*c - 82. Suppose v - 188 = -4*v + 3*g, -o = -4*g. What is the remainder when v is divided by 21?