1. 4, 22, 19, 33, 41, 95, 77.
2. III, VII, XII, XIV, XXV, XXXVII, XLII, LIII, LXVI, LXXXIX, CV, CX, CLI, CC, CXXXII, CCCXVIII, CDII, DXV, MCC, MMDLXIII, MMMXXII.
3. а) XI + V = 11 + 5 = 16 = XVI;
б) XX - II = 22 - 2 = 20 = XX;
в) L - IV = 50 - 4 = 46 = XLVI;
г) CCI + III = 201 + 3 = 204 = CCIV;
д) XXXV + IX = 35 + 9 = 44 = LXIV;
е) CL - VII = 150 - 7 = 143 = CXLIII.