जर WORK = 7935, ROCK = 3587 आणि WART = 1945, असेल तर कोणता अंक T साठी आहे? A. एकतर 9 किंवा 1 B. एकतर 8 किंवा 1 C. एकतर 4 किंवा 5 D. एकतर 1 किंवा 4

WORK and ROCK share O, R and K, and their codes share 3, 5 and 7, so W = 9 and C = 8. WART = 1945 contains W (9) and R; the only digit for R common to both is 5. That leaves A and T as 1 and 4 in some order, so T is either 1 or 4.