To find out how many pages in the stamp book are filled, let's first calculate the total number of stamps he has after receiving more from his grandparents and buying additional ones.
- Start with the original number of stamps: 875
- Add the stamps from his grandparents: 332
- Add the stamps he bought: 72
Now, you can calculate the total number of stamps:
\[ \text{Total stamps} = 875 + 332 + 72 \] \[ \text{Total stamps} = 1279 \]
Next, to find out how many pages are filled with 24 stamps each, divide the total number of stamps by the number of stamps per page:
\[ \text{Number of pages} = \frac{1279}{24} \]
Calculating that gives:
\[ \text{Number of pages} \approx 53.29 \]
Since you can't have a fraction of a page filled, he has filled 53 full pages with stamps, and there will be some stamps left over on a partially filled page.
Thus, the answer is: 53 full pages filled.