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**Blood Relation questions are an
integral part of all Bank and SSC Exams. Read on as we discuss statement and
symbol based blood relation questions and the logical reasoning needed to solve
these questions.**

Irrespective of which competitive exam
you are writing- IBPS PO or SSC CGL, there is no running away from blood
relation questions and the logical reasoning that goes into solving them. In
our previous blog in this series we discussed the basic logical reasoningneeded to solve blood relation questions. Taking that forward, in this blog we
will discuss blood relation questions where the relations are expressed in terms
of statements and symbols along with logical reasoning tricks.

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**Set I – Blood Relation Questions
where Relations are in form of Statements **

One of the
ways, in which blood relation questions are framed, is where relations are
based on given statements. In such blood relation questions, the relationship between
two people is given indirectly through their relation with other people and you
have to find the direct relation between the two people. Such blood relation
questions can be easily solved by plotting a line diagram.

**Problem 1**

**:**D is the brother of B, M is the brother of B, K is the father of M and T is the wife of K. How is B related to T?

**Solution 1:**

The first
reaction on reading blood relation questions like this is- The here is too much
information in the question and also the information given is very confusing.
But hey, relax! Just grab a pen and paper and start plotting the family tree
diagram and the question will just fall in place.

You must
note in the above diagram, that we haven’t assigned any gender to B because the
gender of B is not clear from any of the statements given in the question.

Now from
this diagram we can conclude that D, B and M are siblings and K is their father
while M is their mother. So we can easily say that M is the mother of B, but
the question asked the relation the other way round- How is B related to M? We
do not know the gender of B which implies that B can either be the son or the
daughter.

So the
answer here is- Son or Daughter

**Problem 2**

**:**B is the sister of D, M is the father of D, N is the sister of M. How is B related to N?

**Solution 2:**

Let’s not
get confused this time and rather grab a pen and paper to start plotting the
diagram.

Now if you notice in this diagram
there are 2 generations that are being mentioned and here we don’t know the
gender of D, but it does not make a difference here because we have been asked
the relation between B and N.

We Know B and D are siblings form the
diagram, which implies that D is also the father of N. So from this we know that

B is the daughter of M

N is the sister of M

We know that Father’s Sister is called
Aunt.

So the relationship between B and N is
– B is the niece of N

In blood relation questions like this,
you must be careful and remember not to assume anything because if you assume
things, you will not get the correct answers in blood relation questions.

###
**Set II – Blood Relation Questions
where Relations are in form of Symbols **

In blood
relation questions under this category, the relationship between two people is
given via a symbol and then from the given equation, we need to find the
relationship between the two extremes of the equation. What makes such blood
relation questions extremely important is that fact that at least 3 mark
questions are asked from this section of blood relations in IBPS PO and SSC
CGL.

**Problem**

**:**Read the following statements and answer the questions based on them-

P/Q means P
is the father of Q

P+Q means P
is the mother of Q

P-Q means P
is the brother of Q

P*Q means P
is the sister of Q

**Question 1:**If A+B/C-D, then A is D’s

__?__

1) Sister 2) Grandfather 3) Grandmother 4) Father 5) None of these

**Solution 1:**

Family tree…
That must be the first thing coming to your mind on reading the above question.
That is definitely one of the ways to solve such blood relation questions.
However, the only problem in solving blood relation questions like these by the
family tree is the time taken to solve them. Therefore we will discuss a new smart
method to solve blood relation questions in just a few seconds! For this method
you need to keep a track of two things-

Let’s use
these 2 points and solve this question by elimination of options. Let’s look at
the symbols and what relations they represent-

A+B/C-D
=> In this notation the first
relationship is represented by ‘+’ which stands for ‘mother of’, this implies
that A is female and the generation gap between ‘A’ and ‘B’ is ‘1’.

A

^{-}+_{1}B / C - D
Now that we
know ‘A’ is female we can eliminate all options according to which ‘A’ is male-
Option 2 and Option 4, as these are not possible.

Let’s move
ahead, ‘B’ will be male since ‘/’ represents ‘father’ and the generation gap
will be ‘1’.

A

^{-}+_{1}B^{+}/_{1}C - D
Moving on to
the last part of the equation, we know ‘C’ is male since ‘-‘ represents ‘brother
of’, however the generation gap here will be zero since there is no generation
difference between siblings.

A

^{-}+_{1}B^{+}/_{1}C^{+}-_{0}D
We cannot
determine the gender of ‘D’ here and the overall generation gap here is 2. So
with all the information we can conclude that-

‘A’ is
female and the gender gap between ‘A’ and ‘D’ is 2.

This means
that we can rule out Option 1, because generation gap between siblings is 0.
Now there are 2 options left- Option 3 and Option 5. Given the conditions that
we have arrived at, the given relationship between ‘A’ and ‘D’ can be of grandmother
or grandaunt.

If you are
ready to take a risk or you are running shot of time, you can mark ‘Grandmother’
as the correct answer- Option 4

If you are
not willing to take a risk, you can construct a family tree and get the correct
answer.

**Question 2:**Which of the following shows that ‘A is the aunt of E’?

1) A-B+C/D*E 2) A*B/C*D-E 3) A/B*C+D-E 4) A+B-C*D/E 5) None of these

**Solution 2:**

Now if you
were to use the family tree method to solve such blood relation questions, you
will end up wasting time in IBPS PO and SSC CGL Exams, which is not advisable. So
we will once again use the method of generation gap and gender. So we will find
the gender and generation gap for each of these expressions and the once which
satisfies the given conditions will be the correct answer.

We know that
‘A is the aunt of E’, this clearly implies that ‘A’ is female and the gender
gap between ‘A’ and ‘E’ is 1. With is information let’s assess all the
expressions.

In the first
expression => A – B + C / D*

‘A’ is the
brother of ‘B’ and is therefore male, so this option is eliminated.

In the
second expression => A * B / C * D - E

‘A’ is the sister
of ‘B’ which means that ‘A’ is female and the gender gap between ‘A’ and ‘B’ is
0. As ‘B’ is the father of ‘C’, ‘B’ is male and there is a generation gap of 1
between them. Also ‘C’ is female as ‘C’ is the sister of ‘D’ and the generation
gap is 0 as they are in the same generation. Moving ahead, ‘D’ is male as ‘D’
is the brother of ‘E’ and the generation gap between them is 0 as they are siblings.

A

^{-}*_{0}B^{+}/_{1}C^{-}*_{0}D^{+}-_{0}E => ‘A’ is female and the generation gap between ‘A’ and ‘E’ is 1.
Therefore this option satisfies
both the conditions. However satisfying the conditions in these blood relation
questions does not mean it is the correct answer because the relation can be-
daughter or mother also.

In the third
expression => A / B * C + D - E

‘A’ is the
father of ‘B’ and is therefore male, so this option is eliminated.

In the
fourth expression => A + B – C * D / E

‘A’ is the mother of ‘B’ which means that ‘A’
is female and the gender gap between ‘A’ and ‘B’ is 1. As ‘B’ is the brother of
‘C’, ‘B’ is male and there is a generation gap of 0 between them. Also ‘C’ is
female as ‘C’ is the sister of ‘D’ and the generation gap is 0 as they are in
the same generation. Moving ahead, ‘D’ is male as ‘D’ is the father of ‘E’ and
the generation gap between them is 1.

A

^{- }+_{1}B^{+}–_{0}C^{-}*_{0}D^{+}/_{1}E => ‘A’ is female but the generation gap between ‘A’ and ‘E’ is 2. This expression does not hold true because of the generation gap. Therefore it is eliminated.
In case you
are running short of time it is advisable to mark Option 2 as the answer and
move ahead. If you have time you can verify by plotting the family tree.

**Blood Relation Questions for Practice**

Read the
following information carefully and answer the questions 1 & 2 given below-

A+B means A is the daughter of B.

A-B means A
is the husband of B.

A*B means A is the brother of B.

Question 1:
If P+Q-R, which of the following is true?

1) R is the
mother of P

2) R
is the sister in law of P

3) R is the aunt of P

4) R is the mother in law of P

5) None of these

Question 2:
If P*Q+R, which of the following is true?

1) P is the
brother of R

2) P is the uncle of R

3) P is
the son of R

4) P is the father of P

5) None of these

Question 3:
K is brother of T. M is mother of K. W is brother of M. how is W related to T?

1) Maternal
Uncle

2) Paternal Uncle

3) Grandfather

4) Data Inadequate

5) None of these

Question 4: M is sister of K. D is brother of
K. F is mother of M. how is K related to F?

1) Son

2)
Daughter

3) Son or Daughter

4)
Data Inadequate

5) None of these

Do leave
your answer to these blood relation questions in the comments below.

Keep
practicing!

Nice

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