Mistake Quiz 1.4 ?

I answered Combien cela vaut? and it said I was wrong and the correct answer is Comment coute-t-il? Am I missing something? Which of the following questions doesn't ask: How much does it cost? * Combien cela coûte? * C'est combien? * Combien cela vaut? * Comment coûte-t-il ? For the next one it seems there are two correct answers Comprendre and Exclure but it says Exclure is the correct answer. Which of the following doesn't mean "to include"? * Comprendre * Inclure * Contenir * Exclure