In Relation puzzle type, mutual blood relations or other information of more than two persons are mentioned and information about any two is mentioned.
Q is the brother of R;
P is the sister of Q;
T is the brother of S;
S is the daughter of R.
Who are the consins of Q ?
T is the brother of S, who is the daughter of R.
So, T and S are the children of R.
Now, Q is the brother of R.
So, T and S are the cousins of Q.