Question

Q38. In a certain brick wall, each row of bricks above the bottom row contains one less brick than the row just below it. If there are 5 rows in all and a total of 75 bricks in the wall, how many bricks does the bottom row contain?

• A. (a) 14
• B. (b) 15
• C. (c) 17
• D. (d) 19

Answer 1

The correct option is C

(c) 17

Let x bricks be there in the bottom row

Given that x+(x-1)+(x-2) +(x-3) +(x-4) = 75;

$\Rightarrow$ x = 17