For one cubic metre of brick masonry, number of bricks required, is

ANS:D - 500

Size of actual brick dimensions of 190 mm * 90 mm * 90 mm.
The volume of 1 brick with mortar = 198 * 198 * 98 ( 8 mm mortar thickness on all sides)
= 0.198 m * 0.098 m * 0.098 m.

The volume of a brick with mortar = 0.0019 Cum (m3)
Therefore, the number of bricks required for 1 Cum (m3) = 1/0.002 = 526 Nos.
So, 500 is the correct answer if we ignore mortar.