Five packages per box, with 250 sheets per package is 5*250=<<5*250=1250>>1250 sheets per box.
Two boxes contain a total of 1250*2=<<1250*2=2500>>2500 sheets.
If each newspaper requires 25 pages, then with 2500 sheets she can print 2500/25=<<2500/25=100>>100 newspapers.
#### 100