(I) AB * A = CCD - * + (II) AE : F = G ---------------- (III) B * CF = CHE (IV) (V) (VI) Solution: (IV.1) E = 0 (II.1) 5 is in {F, G} (III.1) 5 is in {F, B} Therefore F = 5. (V) A is odd, but not 1. (II) G is even and A = G/2 <= 8/2 = 4. Therefore A = 3. Then G = 6. (VI.1) D + G = 10 => D = 4 (V) C = 1 (VI.2) H = C + 1 => H = 2 (III) B = 8 38 * 3 = 114 - * + 30 : 5 = 6 ------------------ 8 * 15 = 120 References: - Johannes Lehmann; Mathe mit Pfiff, Manz Verlag 1977, ISBN 3-7863-0383-5 Chap: Kryptarithmetik p71-72 Problem 25 - Johannes Lehmann; Mathe mit Herz, Urania Verlag 1991, ISBN 3-332-00479-4, new edition of "Mathe mit Pfiff" Chap: Kryptarithmetik p81-83 Problem 25