1. H2O is the chemical formula for _______.   limestone   water   common salt   hydrochloric acid   Hint Half-n-half Clue   2. A _______ is a polygon with 7 sides.   hexagon   pentagon   nonagon   heptagon   Half-n-half Clue   3. '_______ begins at home' is a famous proverb.   Beauty   Variety   Honesty   Charity   Half-n-half Clue   4. On which river is Rome located?   Seine   Thames   Spree   Tiber   Half-n-half Clue   5. Who directed the film 'Dial M for Murder'?   Chris Columbus   Ingmar Bergman   Alfred Hitchcock   Steven Spielberg   Half-n-half Clue   6. In which country is the 'Leaning Tower of Pisa' located?   Italy   Greece   Spain   Egypt   Half-n-half Clue   7. Which of these planets is nearest to the sun?   Mars   Mercury   Venus   Earth   Half-n-half Clue