The problem states that in the given pyramid, each brick's number is the sum of the numbers in the two bricks below it. We need to find the number that replaces the question mark. The two numbers below the question mark are -4 and 1.

1. Problem Description

The problem states that in the given pyramid, each brick's number is the sum of the numbers in the two bricks below it. We need to find the number that replaces the question mark. The two numbers below the question mark are -4 and

1.

2. Solution Steps

Let the number replacing the question mark be $x$. According to the problem, $x$ is the sum of the two numbers below it.

Thus, we have:

$x = -4 + 1$

$x = -3$

3. Final Answer

The number that should replace the question mark is -3.