In a family of three generations there are six family members i.e. P, Q, R, S, T, and U. U is the son-in-law of P. Q is the brother-in-law of S who has no siblings. S is the only child of R. R is married to P. T is niece of Q. How is P related to T?

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**Solution:**

1. Given members: P, Q, R, S, T, U.

2. U is the son-in-law of P, so U is married to P's child.

3. R is married to P, so P and R are husband and wife.

4. S is the only child of R, so S is also the child of P (since P and R are married).

5. Q is the brother-in-law of S, and S has no siblings. Since S is the only child of P and R, Q cannot be S's sibling. Therefore, Q must be the brother of S's spouse or the husband of S's sibling. Since S has no siblings, Q must be the brother of S's spouse.

6. U is son-in-law of P and married to S (only child of P and R), so U is S's husband.

7. Q is the brother-in-law of S, so Q is U's brother.

8. T is niece of Q, so T is the daughter of Q's sibling.

9. Q's sibling is U, so T is the daughter of U and S.

10. Therefore, T is the granddaughter of P and R.

11. Since P is married to R (female or male?), and S is their child, and U is son-in-law (male), P is the mother (female) or father (male) of S.

12. Given U is son-in-law of P, and R is married to P, and S is only child of R, it implies P is female (mother) and R is male (father).

13. Therefore, P is the maternal grandmother of T.

**Answer:** Maternal Grandmother

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