I am testing my students' logic. What is the answer they should choose between "Mary" and "Jimbo"? Logic test: Both Mary and Jimbo were out working in a field digging a hole. Mary was working very hard, while Jimbo was just standing around leaning on his shovel. Which person was producing more sweat? (A) Mary (B) Jimbo
Mary

I am testing my students' logic. What is the answer they should choose between "Mars" and "Venus"? Logic test: The mass of Mars is greater then that of Venus. Which planet emits stronger gravity? (A) Mars (B) Venus
Mars

I am testing my students' logic. What is the answer they should choose between "Black Hole" and "Star"? Logic test: The black hole has much more mass than the star so it also has (A) stronger gravity (B) weaker gravity

Black Hole