1. (935421 x 625) = ? A. 542622125 B. 584632125 C. 544638125 D. 584638125   Answer : Option D Explanation : 935421×625=935421×54=935421×(102)4=935421×1000016=584638125 2. (64 – 12)2 + 4 x 64 Continue Reading »