context: ###List of Questions
  (1) How many millilitres are there in twenty-six fifths of a litre?
  (2) Suppose 0 = 4*f - 4*w + 260, -2*f - 259 = 2*f - 5*w. Let v be f/(-14) - 12/(-42). Suppose 0*j - v*j = -45. What is the units digit of j?
  (3) What is the value of 0 - 5 - ((0 - -6) + -11)?
  (4) Three letters picked without replacement from lqqrlqqlqrqpqpppq. What is prob of sequence lrp?
  (5) Suppose a - f + 0*f + 5 = 0, 5*f = -4*a + 25. Solve a*r + 2*r = 0 for r.
q_1: (1) How many millilitres are there in twenty-six fifths of a litre?
q_2: (2) Suppose 0 = 4*f - 4*w + 260, -2*f - 259 = 2*f - 5*w. Let v be f/(-14) - 12/(-42). Suppose 0*j - v*j = -45. What is the units digit of j?
q_3: (3) What is the value of 0 - 5 - ((0 - -6) + -11)?
q_4: (4) Three letters picked without replacement from lqqrlqqlqrqpqpppq. What is prob of sequence lrp?
q_5: (5) Suppose a - f + 0*f + 5 = 0, 5*f = -4*a + 25. Solve a*r + 2*r = 0 for r.