Question

How many bricks are there in a pile one brick in thickness if there are 27 bricks in the bottom row, 25 in the second row, etc., and 1 in the top row?

Answer 1

The total number of bricks in the pile is 378.

Step-by-step explanation:

The number of bricks in the pile can be found by adding up the number of bricks in each row. The first row has 27 bricks, the second row has 25 bricks, and so on until the top row which has 1 brick. To find the total number of bricks, you can use the formula for the sum of an arithmetic series:

Total number of bricks = (number of rows / 2) * (first row + last row)

In this case, the number of rows is 27 (since there are 27 bricks in the bottom row) and the first row is 27 and the last row is 1. Plugging these values into the formula, we get:

Total number of bricks = (27 / 2) * (27 + 1) = 13.5 * 28 = 378 bricks