the sixth-four dollar question是什么意思?

the sixth-four dollar question是什么意思? Question  ________ is easy ________ the question. [   &   The reduced price will save you one dollar for e The doctor thought         The      government  &nbs 她是什么意思   The students are discussing the question (   )(active) four for a dollar是什么意思 是什么意思?  是什么意思  ---Which is the biggest number of the four?   ---_