1. 

854 x 854 x 854 - 276 x 276 x 276= ?
854 x 854 + 854 x 276 + 276 x 276
A. 1156
B. 578
C. 1130
D. 565

Answer: Option B

Explanation:

(a3 - b3)= (a - b) = (854 - 276) = 578
(a2 + ab + b2)