The pattern for each triangle is:

Here's how to solve these number puzzles:

The pattern for each triangle is:

$$\text{Top Number} = (\text{Left Number} + \text{Right Number}) \times \text{Bottom Number}$$

Let's verify this with the example:

• For the first example triangle: $(8 + 15) \times 5 = 23 \times 5 = 115$. This does not match the top number 40.

Let's re-evaluate the example pattern. The image is a bit blurry, but let's try another common pattern for these types of puzzles.

Let's try:

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