Here's a 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  Choose the answer between "Mary" and "Jimbo".
Mary

Here's a logic test: The mass of Mars is greater then that of Venus. Which planet emits stronger gravity? (A) Mars (B) Venus  Choose the answer between "Mars" and "Venus".
Mars

Here's a logic test: The black hole has much more mass than the star so it also has (A) stronger gravity (B) weaker gravity  Choose the answer between "Black Hole" and "Star".
Black Hole