context: ###List of Questions
  (1) Let l = -20 - -38. Suppose 0 = w - 9. Calculate the highest common factor of l and w.
  (2) What is next in -63, -100, -163, -264, -415, -628?
  (3) What is 1435 to the power of 1/2, to the nearest integer?
  (4) How many tonnes are there in 59.40927ug?
  (5) Four letters picked without replacement from zmzmzdmdzzzmmzdmmmzd. What is prob of picking 3 m and 1 z?
q_1: (1) Let l = -20 - -38. Suppose 0 = w - 9. Calculate the highest common factor of l and w.
q_2: (2) What is next in -63, -100, -163, -264, -415, -628?
q_3: (3) What is 1435 to the power of 1/2, to the nearest integer?
q_4: (4) How many tonnes are there in 59.40927ug?
q_5: (5) Four letters picked without replacement from zmzmzdmdzzzmmzdmmmzd. What is prob of picking 3 m and 1 z?