A mason arranges bricks in rows to form a sloping pile
MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series
Problem
A mason arranges bricks in rows to form a sloping pile. The bottom row has 40 bricks, the next row has 37 bricks, the following row has 34 bricks, and so on. If the mason builds 12 such rows, how many bricks are used in all?
(a) 264
(b) 252
(c) 282
(d) 275