For instance, you can pose a question concerning music to your listeners and the person who is going to call first to answer - correctly of course - will gain a small sum of money.

pose 是动词，意思是"提出、摆出"，在这里指"提出问题"。 a 是不定冠词，表示"一个"。 question 是名词，意思是"问题"，指需要回答的疑问或询问。 pose a question 是一个固定搭配，意思是"提出问题"或"发问"。