This document provides definitions for common blood relations terms like brother, sister, uncle, aunt, grandparents, in-laws, and cousins. It also gives examples of relationship questions involving these terms and notations for representing familial relationships. The questions ask the reader to determine how different individuals are related based on the relationships and notations provided, like determining if someone is a nephew, aunt, or mother-in-law based on the familial connections described.

1. Blood Relations

2. Commonly used Blood Relations:
Mother's or Father's son : Brother
Mother's or Fathers' daughter : Sister
Mother's or Fathers' brother : Uncle
Mother's or Fathers' sister : Aunt
Mother's or Fathers' mother : Grandmother
Mother's or Fathers' father : Grandfather
Son's wife : Daughter-in-Law
Daughter's husband : Son-in-Law
Husband's or Wife's sister and Brother's wife : Sister-in-Law
Husband's or Wife's brother and Sister's husband : Brother-in-Law
Brother's or Sister's or Cousin's son : Nephew
Brother's or Sister's or Cousin's daughter : Niece
Son or Daughter of two brothers/sisters : Cousin
Grandfather's or Grandmother's only son : Father
Grandfather's or Grandmother's only daughter-in-law : Mother
Basic Concepts:

3. Some Examples:
1. If D is brother of B, M is brother of B, K is father of M, T is wife of K. How is B
related to T. How is T related to B?
2. If A + B means A is the brother of B; A - B means A is the sister of B and A x B
means A is the father of B. Which of the following means that C is the son of
M?
i) M-NxC+F ii) F-C+NxM iii) N+M-FxC iv) MxN-C+F
3. If A + B means A is brother of B; A x B means A is son of B; and A % B means B
is daughter of A then which of the following means M is maternal uncle of N?
i) M+OxN ii) M%OxN+P iii) M+O%N iv) None of these

4. Some Examples:
(Q: 4-5) Consider the following notations:
a) P | Q -> P is father of Q
b) P + Q -> P is mother of Q
c) P – Q -> P is brother of Q
d) P * Q -> P is sister of Q
4. In A * B | C – D + E, A is E’s ?
i) Grand Aunt ii) Brother iii) Maternal Aunt iv) Mother
5. Which of the following represent A is Aunt of E?
i) A – B + C | D * E ii) A * B | C * D – E
iii) A | B * C + D – E iv) A + B – C * D | E

5. Some Examples:
(Q: 6-8) Consider the following notations:
a) P @ Q -> P is father of Q b) P + Q -> P is husband of Q
c) P $ Q -> P is brother of Q d) P % Q -> P is mother of Q
e) P & Q -> P is sister of Q
6. How is B related to E in A @ B % C & D + E ?
i) Grand Mother ii) Grand Daughter iii) Mother-in-Law iv) Aunt
7. Replace ‘?’ with appropriate sign in A % B + C & D ? E so that C is Aunt of E.
i) $ ii) & iii) + iv) + / & v) @ / %
8. Which of the following is true if A + B & C @ D % E $ F is definitely true ?
i) E is sister-in-law of A ii) F is daughter-in-law of C
iii) B is aunt of D iv) C is uncle of A

6. Some Examples:
9. A lady said, “The sister of son of this man is my mother-in-law”. How is the
husband of that lady related to the man?
i) Son ii) Nephew
iii) Maternal Grandson iv) Maternal Grandfather
10. Pointing to a photograph, Suresh said, "He is the son of the only son of my
mother." How is Suresh related to that boy?
i)Brother ii) Father iii) Cousin iv) Son

7. 11. If A is brother of B; B is sister of C; and C is father of D, then how D is related
to A?
i) Brother ii) Sister iii) Nephew iv) CBD
12.Pointing to a photograph Lata says, "He is the son of the only son of my
grandfather."
How is the man in the photograph related to Lata?
i)Brother ii) Uncle iii) Husband iv) Father
13.Pointing a photograph X said to his friend Y, "She is the only daughter of the
father of
my mother." How X is related to the person of photograph?
i)Daughter ii) Son iii) Brother iv) Sister
Some Examples:

8. 14. Introducing a woman to her husband, Sushma said, “Her sister’s father was
the only son of my grandfather.” How is Sushma related to this woman?
i) Mother ii) Aunt iii) Daughter iv) Sister
15. Pointing towards Lakshita in the photograph, falgun said, “Her mother’s
brother is the only son of my mother’s father”. How is Lakshita’s mother related
to Falgun?
i) Aunt ii) Sister iii) Grandmother iv) mother
Some Examples: