Coded Blood Relation Problems MCQ Quiz - Objective Question with Answer for Coded Blood Relation Problems - Download Free PDF

Last updated on Jun 15, 2025

The topic of Blood Relation includes coded blood relation, in which relationships between two people are established using unique letters or symbols. Any relation in the world either by birth or by marriage is called Blood Relation. It is the relationship between two persons and it is denoted by symbols like G, P, R etc. This is the most important topic for all state and national level exams like SBI PO, IBPS PO, Clerk, CAPF, CISF etc. Firstly we will decode the code to obtain the family tree. Applying the question to yourself is the best way to solve coded blood relation problems. Here you try to relate every statement to yourself and break the question into very small parts that will help you to solve the problem. If you want to solve a lot of problems and MCQ then you could take help in the Testbook test series.

Latest Coded Blood Relation Problems MCQ Objective Questions

Coded Blood Relation Problems Question 1:

If P @ Q means that Q's husband is P; J # L means L is the son of J; and N $ M means that M's brother is N, then which of the following options ensures that A's mother is B?

  1. A # B $ C @ D
  2. C $ D @ A # B
  3. B $ C # A @ D
  4. D @ B # C $ A
  5. None of the above

Answer (Detailed Solution Below)

Option 4 : D @ B # C $ A

Coded Blood Relation Problems Question 1 Detailed Solution

The symbol table is as follows:

According to the question:

P @ Q → P is the husband of Q.

J # L → L is the son of J

N $ M → N is the brother of M

Options:

1) A # B $ C @ D → B is the son of A and brother of C who is the husband of D. 

Thus, A is one of the parents of B.

2) C $ D @ A # B → C is the brother of D who is the husband of A. B is the son of A. 

Thus, A is the mother of B.

3) B $ C # A @ D → B is the brother of C. A is the son of C. A is the husband of D. 

Thus, B is the uncle of A.

4) D @ B # C $ A → D is the husband of B. C is the son of B and brother of A. 

Thus, B is the mother of A.

Hence, "option (4)" ensures that A's mother is B.

Coded Blood Relation Problems Question 2:

Study the following information carefully and answer the given questions:

If ‘P 4 Q’ means ‘P is the mother of Q’

If ‘P 5 Q’ means ‘P is the brother of Q’

If ‘P 6 Q’ means ‘P is the sister of Q’

If ‘F 4 I 6 R 4 S 6 T 5 S’ is given, then how is S related to F?

  1. Grandmother
  2. Grandfather
  3. Grandson
  4. Granddaughter
  5. None of the above

Answer (Detailed Solution Below)

Option 4 : Granddaughter

Coded Blood Relation Problems Question 2 Detailed Solution

Let us first decode the given symbols and then draw a family tree.

P is

Symbol

4

5

6

Meaning

mother

brother

sister

Of Q

 

‘F 4 I 6 R 4 S 6 T 5 S’ means F is mother of I, I is sister of R, R is mother of S, S is sister of T, T is brother of S.

Now draw family tree using following notations

 

Hence, S is granddaughter of F.

Coded Blood Relation Problems Question 3:

‘A + B’ means ‘A is the sister of B’

‘A @ B’ means ‘A is the son of B’

‘A # B’ means ‘A is the father of B’

‘A % B’ means ‘A is the daughter of B’

If H # K # U + T @ M % G + N, then how is G related to U?

  1. Paternal grandmother
  2. Maternal grandmother
  3. Paternal grandfather
  4. Maternal grandfather
  5. None of the above

Answer (Detailed Solution Below)

Option 2 : Maternal grandmother

Coded Blood Relation Problems Question 3 Detailed Solution

Preparing the family tree by using the following symbol:

Here, we make a table for the given relation:

A is

Symbol

+

@

#

%

Meaning

Sister

Son

Father

Daughter

of B

The family tree diagram of 'H # K # U + T @ M % G + N' is →

H is father of K, K is father of U, U is Sister of T, T is son of M, M is Daughter of G, G is Sister of N.

Here, G is the Maternal grandmother of U as per the diagram.

Hence, the correct answer is "Maternal grandmother".

Coded Blood Relation Problems Question 4:

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, and  
P ⊙ Q means P is the husband of Q.  

Which of the following means X is the father of Y?

  1. X ⊗ Z ⊕ Y  
  2.  Y ⊘ Z ⊕ X  
  3. X ⊘ Z ⊙ U ⊕ Y  
  4. Y ⊘ Z ⊙ X

Answer (Detailed Solution Below)

Option 1 : X ⊗ Z ⊕ Y  

Coded Blood Relation Problems Question 4 Detailed Solution

Symbols ⊕ 
Coded as mother brother  sister husband 

Let's check options one by one:

Option 1) X ⊗ Z ⊕ Y  

Option 2)  Y ⊘ Z ⊕ X  

Option 3) X ⊘ Z ⊙ U ⊕ Y  

Option 4) Y ⊘ Z ⊙ X

Coded Blood Relation Problems Question 5:

Read the following information carefully and answer the question given below:

M * N means ‘M is the sister of N’

M % N means ‘M is the father of N’

M # N means ‘M is the mother of N’

Which of the following option gives that, M is father of R?

  1. N % R * M
  2. N * M % S # R
  3. N * M % R
  4. R * M # N
  5. None of the above

Answer (Detailed Solution Below)

Option 3 : N * M % R

Coded Blood Relation Problems Question 5 Detailed Solution

 

1) N % R * M → N is father of R, R is sister of M

2) N * M % S # R → N is sister of M, M is father of S, S is mother of R

3) N * M % R → N is sister of M, M is father of R

4) R * M # N → R is sister of M, M is mother of N

Hence, ‘3’ is the correct answer.

 

Symbol

 

*

%

#

 

Meaning

 

Sister

Father

Mother

Top Coded Blood Relation Problems MCQ Objective Questions

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

First row : 18, 9, 27

Second row : 40, 36, 140

Third row : 40, 13, ?

(NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

  1. 53
  2. 54
  3. 25
  4. 45

Answer (Detailed Solution Below)

Option 3 : 25

Coded Blood Relation Problems Question 6 Detailed Solution

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The logic followed here is : (2nd number × 5) - 1st number = 3rd number

Given :

  • First row : 18, 9, 27

(9 × 5) - 18 = 27

45 - 18 = 27

27 = 27 (LHS = RHS)

​And,

  • Second row : 40, 36, 140

(36 × 5) - 40 = 140

180 - 40 = 140

140 = 140 (LHS = RHS)

Similarly,

  • Third row : 40, 13, ?

(13 × 5) - 40 = ?

65 - 40 = ?

25 = ?

Hence, "25" is the correct answer.

'A + B' means 'A is the sister of B'.

'A - B' means 'A is the brother of B'.

'A × B' means 'A is the father of B'.

'A ÷ B' means 'A is the wife of B'.

If A + B - C ÷ D × E - F, then which of the following statements is NOT correct?

  1. C is the mother of F.
  2. E is the brother of B.
  3. A is the sister of the wife of D.
  4. A is the sister of C. 

Answer (Detailed Solution Below)

Option 2 : E is the brother of B.

Coded Blood Relation Problems Question 7 Detailed Solution

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A + B - C ÷ D × E - F → A is sister of B, B is brother of C, C is wife of D, D is father of E, E is brother of F.

By using the symbols in the table given below, we can draw the following family tree:

1. C is the mother of F → True

2. E is the brother of B → False (E is son of D)

3. A is the sister of the wife of D → True

4. A is the sister of C → True

Hence, ‘E is the brother of B’ is the correct answer.

A is

Symbol

+

-

×

÷

Meaning

Sister

Brother

Father

Wife

to B

‘A + B’ means ‘B is the father of A’

‘A # B’ means ‘B is the sister of A’

‘A @ B’ means ‘B is the brother of A’

If A @ B # C + D + E, then how is E related to A?

  1. Son
  2. Father
  3. Father’s father
  4. Father’s brother

Answer (Detailed Solution Below)

Option 3 : Father’s father

Coded Blood Relation Problems Question 8 Detailed Solution

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Family Chart:

Decoding the Symbols:

Symbol + # @
Meaning Father Sister Brother

 

Given: A @ B # C + D + E

It means: B is Brother of A, C is Sister of B, D is Father of C, E is Father of D.

Here, E is the 'Father’s Father' of A.

Hence, the correct answer is "Option 3".

If P + Q means that P is the mother of Q, P ÷ Q means that P is the father of Q, P - Q means that P is the sister of Q, then which of the following expression shows that A is the maternal grandfather of C?

  1. B ÷ A + C
  2. A - B ÷ C
  3. A + B ÷ C
  4. ÷ B + C

Answer (Detailed Solution Below)

Option 4 : A ÷ B + C

Coded Blood Relation Problems Question 9 Detailed Solution

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Given :

A is

Symbol

+

÷ 

-

Meaning

Mother

Father

Sister

to B

So,

  • Option - (1) : B ÷ A + C → B is the father of A who is the mother of C.

Here, A is the mother of C.

  • Option - (2) : A - B ÷ C → A is the sister of B who is the father of C.

Here, A is the paternal aunt of C.

  • Option - (3) : A + B ÷ C → A is the mother of B who is the father of C.

Here, A is the paternal grandmother of C.

  • Option - (4) : ÷ B + C → A is the father of B who is the mother of C.

Here, A is the maternal grandfather of C.

Hence, "Option - (4)" is the correct answer.

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

First row - 12, 7, 32

Second row - 17, 13, 33

Third row - 14, 8, ?

(NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed)

  1. 38
  2. 35
  3. 43
  4. 42

Answer (Detailed Solution Below)

Option 1 : 38

Coded Blood Relation Problems Question 10 Detailed Solution

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The logic followed here is : (5 × 1st number) - (4 × 2nd number) = 3rd number

So,

  • First row - 12, 7, 32

(5 × 12) - (4 × 7) = 32

60 - 28 = 32

32 = 32 (LHS = RHS)

And, 

  • Second row - 17, 13, 33

(5 × 17) - (4 × 13) = 33

85 - 52 = 33

33 = 33 (LHS = RHS)

Similarly,

  • Third row - 14, 8, ?

(5 × 14) - (4 × 8) = ?

70 - 32 = ?

38 = ? 

Hence, "38" is the correct answer.

‘R+S’ means ‘R is the daughter of S’. ‘R−S’ means ‘R is the husband of S’.‘R × S’ means ‘R is the brother of S’. If ‘T × V + Z’, then which of the following options is true?

  1. T is the uncle of Z.
  2. T is the father of Z
  3. T is the son of Z
  4. T is the brother of Z

Answer (Detailed Solution Below)

Option 3 : T is the son of Z

Coded Blood Relation Problems Question 11 Detailed Solution

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Family Chart:

Given:

‘R + S’ means ‘R is the daughter of S’.

‘R − S’ means ‘R is the husband of S’.

‘R × S’ means ‘R is the brother of S’.

Let us first decode the given symbols and then draw a family tree.

R is

Symbol

+

-

×

Meaning

daughter

husband

brother

to S

Now break the code ‘T × V + Z’

1) T × V

‘T × V’ means ‘T is the brother of V’.

2) V + Z

‘V + Z’ means ‘V is the daughter of Z’.

Now, check all the options

Option (1) T is the uncle of Z → False (T is the son of Z)

Option (2) T is the father of Z → False (T is the son of Z)

Option (3) T is the son of Z → True

Option (4) T is the brother of Z → False (T is the son of Z and brother of V)

Hence, “option (3)” is the correct answer.

A @ B means ‘A is the husband of B’.

A & B means ‘A is the mother of B’.

A # B means ‘A is the daughter of B’.

A % B means ‘A is the sister of B’.

If G % V @ K & P and,

G # S % M, then how is S related to P?

  1. Father’s mother
  2. Mother-in-law
  3. Son’s son
  4. Father-in-law

Answer (Detailed Solution Below)

Option 1 : Father’s mother

Coded Blood Relation Problems Question 12 Detailed Solution

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Given :

A is

Symbol

@

&

#

%

Meaning

Husband

Mother

Daughter

Sister

to B

Statements given : G % V @ K & P and G # S % M

Explanation :

  • G % V → G is the sister of V.

  • V @ K → V is the husband of K.

  • K & P → K is the mother of P.

  • G # S → G is the daughter of S.

  • S % M → S is the sister of M.

Thus, from the final family tree S is the paternal grandmother i.e father's mother of P.

Hence, "Father’s mother" is the correct answer.

'X $ Y' means 'X is the son of Y'

'X @ Y' means 'X is the husband of Y '

'X * Y' means 'X is the sister of Y'

'X # Y' means 'X is the mother of Y'

If 'P $ Q # V @ B', how is P related to B?

  1. Mother
  2. Son
  3. Father
  4. Husband's brother

Answer (Detailed Solution Below)

Option 4 : Husband's brother

Coded Blood Relation Problems Question 13 Detailed Solution

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Preparing the family tree using the following symbols:

Symbol Meaning
 $  son 
 Husband
*  Sister
#  Mother

According to the given question: 

'P $ Q # V @ B' is shown as a family tree diagram below,

Clearly, P is the Husband's brother to B

Hence, "Option 4" is the correct answer.

A & B means ‘A is the wife of B’

A # B means ‘A is the father of B’

A @ B means ‘A is the son B’

A % B means ‘A is the husband of B’

A + B means ‘A is the mother of B’

If A & B # C & D @ E % F + G, then how is A related to D?

  1. Daughter-in-law
  2. Mother-in-law
  3. Mother
  4. Sister

Answer (Detailed Solution Below)

Option 2 : Mother-in-law

Coded Blood Relation Problems Question 14 Detailed Solution

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Family Chart:

Given:

A & B A is the wife of B
A # B A is the father of B
A @ B A is the son B
A % B A is the husband of B
A + B A is the mother of B


Now we substitute the values in the given equation:

A & B # C & D @ E % F + G becomes A is the wife of B, B is the father of C, C is the wife of D, D is the son E, E is the husband of F, F is the mother of G.       

From the chart we can see that, A is mother-in-law of D.

Hence, the correct answer is "Option 2".

'P ÷ Q ' means 'P is the son of Q',

'P - Q' means ' P is the husband of Q',

'P × Q' means ' P is the brother of Q' and 

'P + Q' means 'P is the wife of Q'.

If 'J ÷ H + M ÷ S - F', then how is F related to J?

  1. Mother
  2. Grandfather
  3. Grandson
  4. Grandmother

Answer (Detailed Solution Below)

Option 4 : Grandmother

Coded Blood Relation Problems Question 15 Detailed Solution

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Family Table:

Let us first decode the given symbols and then draw a family tree.

P is

Symbol

+

÷

×

-

Meaning

Wife

Son

Brother

Husband

Of Q

Drawing the Family tree for 'J ÷ H + M ÷ S - F'

So, F is the Grandmother of J.

Hence, the correct answer is "Grandmother".

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