Maths Tricks

Maths Tips Blood Relationship, Formulas, Problems

Here we are listed All the Important terms, Formulas, Problems of Blood Relationship on General Aptitude. Those Maths Tips will help you get maximum marks from this section. This file will be updated regularly, So please bookmark this page on your browser to get latest updates. You can also download the PDF file of the following below.

Important Terms

Father’s sidePaternal
Mother’s sideMaternal
Mother’s or Father’s FatherGrandfather (Maternal or Paternal)
Mother’s or Father’s MotherGrandmother (Maternal or Paternal)
Mother’s or Father’s BrotherUncle
Mother’s or Father’s SisterAunt
Mother’s or Father’s SonBrother
Mother’s or Father’s DaughterSister
Son’s WifeDaughter-in-law
Daughter’s HusbandSon-in-law
Husband’s or wife’s FatherFather-in-law
Husband’s or wife’s MotherMother-in-law
Husband’s or wife’s BrotherBrother-in-law
Husband’s or wife’s SisterSister-in-law
Sister’s HusbandBrother-in-law
Brother’s WifeSister-in-law
Brother’s or Sister’s SonNephew
Brother’s or Sister’s DaughterNiece
Uncle’s or Aunt’s Son or DaughterCousin (He is considered as First Cousin)
Son or Daughter of the First CousinCousin (He is mainly addressed as Second Cousin)
Grandson’s or Grand Daughter’s SonGreat Grand son
Grandson’s or Grand Daughters’s DaughterGreat Grand Daughter
Father’s or Mother’s AuntGrand Aunt or Grand Aunt
Father’s or Mother’s UncleGrand Uncle or Great Uncle
Real Brother or Sister (Common Parents)Sibling


1) A is B’s sister. C is B’s mother. D is C’s father. E is D’s mother. Then, how is A related to D?


A is the sister of B and B is the daughter of C.

So, A is the daughter of C. Also, D is the father of C.

So, A is the granddaughter of D

2) Pointing to a person, a man said to a woman, “His mother is the only daughter of your father.” How was the woman related to the person ?


Daughter of your father — Your sister.

So, the person’s mother is woman’s sister

or the woman is person’s aunt. 

3) A girl introduced a boy as the son of’ the daughter of the father of her uncle. The boy is girl’s


Daughter of uncle’s father — Uncle’s sister — Mother;

Mother’s son — Brother 

4) A woman introduces a man as the son of the brother of her mother. How is the man, related to the woman ?


Brother of mother — Uncle

Uncle’s son — Cousin

5) Pointing to a lady, a man said, “The son of her only brother is the brother of my wife.” How is the lady related to the man ?


Brother of my wife — My; Son of lady’s brother is the brother-in-law of the man. 

So lady’s brother is man’s father-in-law

i.e., the lady is the sister of man’s father-in-law. 

If you have any feedbacks or doubts regarding Blood Relationship, Formulas, Problems article, feel free to drop a comment below with clear information. We are happy to help you.

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