Premise: And maybe the time limit could be stretched a little, once he came up with the answer.

Hypothesis: The time limit might be stretched a bit if he came up with an answer.
Answer: yes

Premise: Many spectacular pictures accompany the article.

Hypothesis: The article has only one very grainy picture.
Answer: no

Premise: Jon thought he knew what the man meant.

Hypothesis: He nodded as the man spoke showing his understanding.
Answer: it is not possible to tell

Premise: Japan's 120 million inhabitants have to crowd the coastal plains and the narrow river valleys despite a total land area greater than Germany's.

Hypothesis: Japan is larger than Germany.
Answer: yes