Some exercises would be better done in a new order. The suggestions below ensure that every exercise begins with the most basic problems, then gets progressively more difficult.
Propositional Logic (PL)
pp. 56-57: Ex. 3: new order: 3, 6, 9, 1, 2,4, 5, 7, 8, 10, 17, 19-29, 11 then the remaining ones.
p. 96: Ex. 2: try #3-8 before #1 and #2.
Property Predicate Logic (PPL)
p.185: Ex 2: keep #1-5 the same, then starting at problem #6, change to: 6, 8, 11,14, 15,16, 7, 9, 10, 12 ,13.
Relational Predicate Logic (RPL)
p. 225: Ex. 5: Don't worry about #5, 6, 7, 8, 9, 10, or 11 -- see the new exercises (Chapter 13) for replacements.
p. 237: Ex. 1: new order: 6, 3, 4 ,9, 2, 5, 1, 7, 8.
p. 246: Ex. 5: Add problems # 5, 6, 7, 8, 9, 10, and 11 from p. 225.
p. 246: Ex. 6: new order: 1,6,4,5,2,3.
Relational Predicate Logic with Identity (RPL=)
p. 267: Ex. 4: new order: 1, 2, 3, 5, 8, 9, 7, 6, 4.