BLOOD RELATIONS -
Important Points to Remember
a) While
attempting Blood Relation questions, first we should read the ‘Directions’
given carefully
b) Then
pin-point the two persons between whom the relationship is to be established
c) Try to
connect the given relations
d) While
determining the relationships between two persons one should be careful about
the sexes of the persons involved
e) Sometimes
it is not possible to define relationships between two persons without knowing
their sex
Father's father → Grandfather
Father's mother → Grandmother
Father's brother → Uncle
Father's sister → Aunt
Children of uncle → Cousin
Wife of uncle → Aunt
Children of aunt → Cousin
Husband of aunt → Uncle
2. Relations of Maternal side:
Mother's father → Maternal grandfather
Mother's mother → Maternal grandmother
Mother's brother Maternal uncle
Mother's sister → Aunt
Children of maternal uncle → Cousin
Wife of maternal uncle → Maternal aunt
Relations from one generation to next:
Different types of questions with explanation:
Type 1: Single Person Blood Relations or Descriptive type
1. Introducing a
boy, a girl said, "He is the son of the daughter of the father of my
uncle." How is the boy related to the girl?
Solution:
The father of the boy's uncle =>
the grandfather of the boy and daughter of the grandfather => sister of
father
2. Pointing to a
photograph, Vipul said, "She is the daughter of my grandfather's only
son." How is Vipul related to the girl in the photograph?
Solution:
My grandfather's only son => My
father
So, the girl is the daughter of
Vipul's father i.e., Vipul is the girl`s brother.
3. A girl
introduced a boy as the son of the daughter of the father of her uncle. The boy
is girl`s
Solution:
Daughter of uncle's father =>
Uncle's sister => Mother;
Mother's son => Brother
Type 2: Coded type relations
Directions for
questions (4 - 5): Answer the questions based on the following information
given below:
I. A $ B means A
is mother of B.
II. A # B means A
is father of B.
III. A @ B means
A is husband of B.
IV. A % B means A
is daughter of B.
4. P @ Q $ M # T
indicates what relationship P with T?
Solution:
P @ Q $ M # T means
P is the husband of Q and Q is the
mother of M and M is the father of T. so, clearly P is T’s paternal
grandfather.
5. If G $ M @ K,
how is K related to G?
Solution:
G $ M @ K means
G is the mother of M and M is the
husband of K. Clearly K is G’s daughter-in la
6. U + V means U
is the brother of V,
W – X means W is
the father of S,
X Y means X is the sister of Y,
Y Z means Z is the mother of Y.
Which of the
following means that N is the mother of O?
a) L + M ÷ N × O
b) L – M × O ÷ P
c) N ÷ M × L ÷ O
d) M + L ÷ O × N
Solution:
M + L ÷ O
N means M is the brother of L and L
is the sister of O and N is the mother of O.
Type 3: Puzzle Type relations
7. T is son of P,
S is son of Q, T is married to R, R is Q’s daughter, U is son of S. How U is
related to R.
Solution:
U is Son of R’s brother. Then U is nephew
of R
Directions (8 -
10): Read the following information carefully and answer the questions given
below it:
In a family,
there are six members A, B, C, D, E and F. A and B are a married couple, A
being the male member. D is the only son of C, who is the brother of A. E is
the sister of D. B is the daughter-in-law of F, whose husband has died.
Explanation:
8. How is F
related to A?
Solution:
F is Mother of A
Type 4: Data Sufficiency type relations
9. How is T
related to K?
Statements:
I. R's sister J
has married Ts brother L, who is the only son of his parents.
II. K is the only
daughter of L and J.
Solution:
From I, we know that L is T's brother
and J's husband. Since L is the only son of his parents, T is L's sister.
From II, we know that K is L's
daughter.
Thus, from I and II, we conclude that
T is the sister of K's father i.e. T is K's aunt.
10. How many
children does M have ?
Statements:
I. H is the only
daughter of X who is wife of M.
II. K and J are
brothers of M.
Solution:
From I, we conclude that H is the only daughter of M. But
this does not indicate that M has no son. The information given in II is
immaterial.
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