OK, guys, you are probably finished the puzzles and crossword at this stage, so here are the answers, should you be interested in knowing how you did.
627
2 3 5 7 9 25
(2+3) x 5 = 25 25 x 25 = 625 625 + (9-7) =
627
FIGURE IT OUT
1. 4100
2. FIVE ... take 2 letters away (F and E) and you are left with IV -- the roman numerals for 4.
3. SEVEN (-S) = EVEN