Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Opponent# | Site | Result | Attendance |
| --- | --- | --- | --- | --- |
| 10/06/1928 | Creighton | Memorial Stadium • Minneapolis, MN | W40-0 | 20,000 |
| 10/13/1928 | Purdue | Memorial Stadium • Minneapolis, MN | W15-0 | 25,000 |
| 10/20/1928 | Chicago | Memorial Stadium • Minneapolis, MN | W33-7 | 58,000 |
| 10/27/1928 | at Iowa | Iowa Field • Iowa City, IA | L6-7 | 30,000 |
| 11/03/1928 | at Northwestern | Dyche Stadium • Evanston, IL | L9-10 | 45,000 |
| 11/10/1928 | Indiana | Memorial Stadium • Minneapolis, MN | W21-12 | 25,000 |
| 11/17/1928 | Haskell | Memorial Stadium • Minneapolis, MN | W52-0 | 20,000 |
| 11/24/1928 | at Wisconsin | Camp Randall Stadium • Madison, WI | W6-0 | 10,000 |
| *Non-conference game. Homecoming. | *Non-conference game. Homecoming. | *Non-conference game. Homecoming. | *Non-conference game. Homecoming. | *Non-conference game. Homecoming. |
Question:
What is the Attendance number when the Opponent was purdue?
Answer:
25000.0