The phrase "a third set of questions" is correct and usable in written English.
It can be used when referring to an additional group of questions in a sequence or series.
Example: "After reviewing the first two sets of questions, I have prepared a third set of questions for further discussion."
Alternatives: "an additional group of questions" or "a subsequent set of questions".
A third set of questions concerns the war's aftermath.
A third set of questions asks how emerging economies, especially small open ones, should best distinguish between a permanent rise in capital inflows and a temporary surge and how they should deal with such a surge.Managing currency tensions will require greater harmony on all these fronts.
Finally, a third set of questions could be asking about the structural properties of genetic networks, and how these properties can reveal organizing principles of the underlying biomolecular systems, e.g., [8], [14].
A third set of questions concerns the bearing of the present study on the development of biological measures of political ideology.
Upon completion of the two sets of questions, participants were given the choice of selecting one of the data entry methods to complete a third set of questions from the LLFDI survey.
Those who indicated they had sexual intercourse (including 'anal' sexual intercourse) before had to answer a third set of questions, relating to their first and last sexual experience (e.g. age at first sex, how long ago they last had sexual intercourse and their experience at first and last sex (e.g. forced; tricked; consensual).
A second set of questions dealt with the status of the greenway concept.
Then the researchers asked a second set of questions on unrelated topics.
This conclusion raises a second set of questions about responsibility namely, questions about the role responsibilities of federal district court judges.
A first set of questions related to the character of provisions imposing language requirements, and more particularly whether they constituted "technical regulations" within the meaning of the Directive.
Mr. Cooley was challenged by Robert F. Horan Jr., the lead prosecutor, about whether his redirect examination of a witness -- that is, a second set of questions -- impermissibly went beyond the scope of his original questions.
