context: ###List of Questions
  (1) Calculate prob of picking 1 h and 1 o when two letters picked without replacement from {o: 3, e: 2, h: 10, r: 4}.
  (2) What is 3/40 of a litre in millilitres?
  (3) What is the next term in 26, 38, 24, -28, -130, -294, -532?
  (4) What is -1062 divided by 2?
  (5) Let f(j) = -j**3 + j**2 + j + 1. Let o be f(-1). Let a = -1 - o. What is the units digit of a*3/(0 + -3)?
q_1: (1) Calculate prob of picking 1 h and 1 o when two letters picked without replacement from {o: 3, e: 2, h: 10, r: 4}.
q_2: (2) What is 3/40 of a litre in millilitres?
q_3: (3) What is the next term in 26, 38, 24, -28, -130, -294, -532?
q_4: (4) What is -1062 divided by 2?
q_5: (5) Let f(j) = -j**3 + j**2 + j + 1. Let o be f(-1). Let a = -1 - o. What is the units digit of a*3/(0 + -3)?