DS Marina's Suitcase

[wisehacks]

Each bottle of wine in Marina's suitcase weighs 2 1/4 pounds. IDoes she have more than 6 bottles of wine in her suitcase?

(1) Marina's suitcase and its contents weigh at total of 15 pounds.
(2) Marina's suitcase weighs 6 pounds when empty.

respuesta: show

Cada botella pesa 9/4. Como las botellas son unidades enteras, el mínimo número de botellas mayor que 6 es 7. Siete botellas pesan . That's almost 16, or 15 3/4. It's more than 15 anyway.

(1) If the case and the bottles weigh 15 pounds, it's impossible that she carries more than 6 bottles of wine based on the above calculations. Sufficient.
(2) We know nothing about the total weigh, or the weigh of all the bottles. Not sufficient.

The answer is (A). (1) alone is sufficient, but (2) isn't.