context: ###List of Questions
  (1) Two letters picked without replacement from {j: 11, h: 2, r: 1, k: 1}. Give prob of picking 1 k and 1 h.
  (2) How many grams are there in 7/2 of a kilogram?
  (3) What is next in -154, -303, -450, -595?
  (4) Suppose 2*k - 5 = 5. Suppose -4*a = -5*w + 30, 2*w - w - 15 = -a. Let v = w - 6. Calculate the remainder when k is divided by v.
  (5) Work out 0 * 338.1.
q_1: (1) Two letters picked without replacement from {j: 11, h: 2, r: 1, k: 1}. Give prob of picking 1 k and 1 h.
q_2: (2) How many grams are there in 7/2 of a kilogram?
q_3: (3) What is next in -154, -303, -450, -595?
q_4: (4) Suppose 2*k - 5 = 5. Suppose -4*a = -5*w + 30, 2*w - w - 15 = -a. Let v = w - 6. Calculate the remainder when k is divided by v.
q_5: (5) Work out 0 * 338.1.