context: ###List of Questions
  (1) What comes next: 50, 19, -24, -85, -170, -285, -436, -629?
  (2) Three letters picked without replacement from zzizvfzzzvzizf. Give prob of sequence ffz.
  (3) Suppose -2*b - 9 = 21. Let f be (-1)/5 - 63/b. Suppose 3*t - 2*p - 11 = 0, 8*p - 4*p + 8 = f*t. What is the units digit of t?
  (4) 329/(-210) - 75/(-45)
  (5) What is four sevenths of a week in days?
q_1: (1) What comes next: 50, 19, -24, -85, -170, -285, -436, -629?
q_2: (2) Three letters picked without replacement from zzizvfzzzvzizf. Give prob of sequence ffz.
q_3: (3) Suppose -2*b - 9 = 21. Let f be (-1)/5 - 63/b. Suppose 3*t - 2*p - 11 = 0, 8*p - 4*p + 8 = f*t. What is the units digit of t?
q_4: (4) 329/(-210) - 75/(-45)
q_5: (5) What is four sevenths of a week in days?