Mensa Answers
1. Roster, resort
2. 85 (101–10=91, 91-9=82, 82+3=85)
3. Down in the dumps
4. For sale: Size-ten white princess-style wedding gown. Excellent condition -- worn once only. (Code: 1=A, 2=B, 3=C, etc.)
5. Ing (bring, cling, spring, wring)
6. Scare, care; spare, pare
7. There are three boys and seven girls.
8. Existentialism
Bonus Answer: Michael Caine