Karl has 25 stickers.
Ryan has 20 more stickers than Karl, so Ryan has 25 + 20 = 45 stickers.
Ben has 10 fewer stickers than Ryan, so Ben has 45 - 10 = 35 stickers.
Altogether, they have 25 + 45 + 35 = 105 stickers.
#### 105
The answer is: 105
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Karl has 25 stickers, Ryan has 20 more stickers than Karl, and Ben has 10 fewer stickers than Ryan, how many stickers do they have altogether when they place all their stickers in one sticker book?

### Answer:
