Issue 5 (1976)

Total problems: 63 — Solved: 39, Partially solved: 2, Open: 22.

The following problem numbers are missing from the official book: 5.31, 5.37, 5.45, 5.57, 5.58, 5.66.

5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 5.19 5.20 5.21 5.22 5.23 5.24 5.25 5.26 5.27 5.28 5.29 5.30 5.31 (missing) 5.32 5.33 5.34 5.35 5.36 5.37 (missing) 5.38 5.39 5.40 5.41 5.42 5.43 5.44 5.45 (missing) 5.46 5.47 5.48 5.49 5.50 5.51 5.52 5.53 5.54 5.55 5.56 5.57 (missing) 5.58 (missing) 5.59 5.60 5.61 5.62 5.63 5.64 5.65 5.66 (missing) 5.67 5.68 5.69