context: ###List of Questions
  (1) How many nanometers are there in 0.0329471m?
  (2) What is the next term in 2506, 5011, 7516, 10021, 12526, 15031?
  (3) Two letters picked without replacement from dfd. Give prob of sequence fd.
  (4) Put together -22456 and 5.
  (5) Let n = 17 - 12. Suppose -4*t + h = 48, -h + 24 = -n*t - 37. Let b = t + 21. What is the units digit of b?
q_1: (1) How many nanometers are there in 0.0329471m?
q_2: (2) What is the next term in 2506, 5011, 7516, 10021, 12526, 15031?
q_3: (3) Two letters picked without replacement from dfd. Give prob of sequence fd.
q_4: (4) Put together -22456 and 5.
q_5: (5) Let n = 17 - 12. Suppose -4*t + h = 48, -h + 24 = -n*t - 37. Let b = t + 21. What is the units digit of b?