To find out how many megabytes 35 of the pictures take up, we first need to determine the space that each picture occupies.
Brooklynn downloaded a total of 264 pictures that took up 528 megabytes. We can find the size of each picture by dividing the total megabytes by the number of pictures:
\[ \text{Size of each picture} = \frac{528 \text{ megabytes}}{264 \text{ pictures}} = 2 \text{ megabytes per picture} \]
Now that we know each picture takes up 2 megabytes, we can calculate the space taken up by 35 pictures:
\[ \text{Space for 35 pictures} = 35 \text{ pictures} \times 2 \text{ megabytes per picture} = 70 \text{ megabytes} \]
Thus, 35 of these pictures take up 70 megabytes.