context: ###List of Questions
  (1) Four letters picked without replacement from {b: 1, s: 11, w: 1}. What is prob of sequence ssbw?
  (2) Total of 1809 and 0.3.
  (3) What comes next: -591, -611, -617, -603, -563, -491?
  (4) How many nanograms are there in 2155.172 kilograms?
  (5) What is the smallest common multiple of 4 and 3/4 + 52/16?
q_1: (1) Four letters picked without replacement from {b: 1, s: 11, w: 1}. What is prob of sequence ssbw?
q_2: (2) Total of 1809 and 0.3.
q_3: (3) What comes next: -591, -611, -617, -603, -563, -491?
q_4: (4) How many nanograms are there in 2155.172 kilograms?
q_5: (5) What is the smallest common multiple of 4 and 3/4 + 52/16?