context: ###List of Questions
  (1) Solve -90 = -2*s + r - 100, -3*r - 25 = 5*s for s.
  (2) How many days are there in 122.088 hours?
  (3) Calculate prob of picking 2 s when two letters picked without replacement from sssssszssssss.
  (4) Let r be (0 + -1)*-1*1. Suppose 10 + 0 = 5*l. Suppose -4 = -l*u - 2. Calculate the greatest common divisor of u and r.
  (5) What is the product of -0.02 and 20.2?
q_1: (1) Solve -90 = -2*s + r - 100, -3*r - 25 = 5*s for s.
q_2: (2) How many days are there in 122.088 hours?
q_3: (3) Calculate prob of picking 2 s when two letters picked without replacement from sssssszssssss.
q_4: (4) Let r be (0 + -1)*-1*1. Suppose 10 + 0 = 5*l. Suppose -4 = -l*u - 2. Calculate the greatest common divisor of u and r.
q_5: (5) What is the product of -0.02 and 20.2?