A cube of edge 5 cm is cut into cubes of each edge 1 cm. The ratio of the total surface area of one of the small cubes to that of the large cube is equal to	Choose the correct answer
A) 1 : 5 B) 1 : 25 C) 1 : 125 D) 1 : 625 E) none

Rationale: solution required ratio = ( 6 x 1 x 1 / 6 x 5 x 5 ) ‹ = › 1 / 25 ‹ = › 1 : 125 . answer b
Answer: B