Reasoning Ability - SPLessons

Blood Relations

Chapter 7

SPLessons 5 Steps, 3 Clicks
5 Steps - 3 Clicks

Blood Relations

Blood Relations

shape Description

Blood relations is all about the various relations exists in a family. These questions are to test the knowledge and skill of a candidate.
Some of the relations are listed below:
1. Mother’s or Father’s son – Brother
2. Mother’s or Father’s daughter – Sister
3. Mother’s or Father’s brother – Uncle
4. Mother’s or Father’s Sister – Aunt
5. Mother’s or Father’s father – Grand Father
6. Mother’s or Father’s Mother – Grand Mother
7. Son’s wife – Daughter-in-law
8. Daughter’s Husband – Son-in-law
9. Husband’s or Wife’s Sister – Sister-in-law
10. Husband’s or Wife’s Brother – Brother-in-law
11. Brother’s son – Nephew
12. Brother’s daughter – Niece
13. Uncle or Aunt’s Son or Daughter – Cousin
14. Sister’s Husband – Brother-in-law
15. Brother’s wife – Sister-in-law
16. Grandson’s or Grand Daughter’s Daughter – Great Grand Daughter


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shape Concept

Blood relations problems are of three types. They are:
1. Convert jumbled up descriptions.
2. Relation puzzle.
3. Coded relations.

1. Convert jumbled up descriptions:
An indirect description is given in the form of little connections and is required to examine the entire chain of relations and convert the immediate relationships between the persons concerned.

2. Relation puzzle:
One or more than two persons common blood relations are mentioned. The candidate is required to examine the given information, work out on a family chart and later on answer the given questions.

3. Coded relations:
In coded relations, by using certain specific codes or symbols the relationships are represented.
Such symbols or codes are:
+, -, ×, ÷, *, $, @, Ο, £, etc.

shape Model
Problems

Model 1: Showing to a woman in the gallery, Angelina said, “Her son’s father is the son-in-law of my mother”. Now, how Angelina is related to this woman?
Solution:
Woman’s son’s father is woman’s husband.
So, woman’s husband is the son-in-law of Angelina’s mother, i.e. the woman is the daughter of Angelina’s mother.
Therefore, Angelina is the woman’s sister.

Model 2: S and T are brothers. U and V are sisters. S’s son is V’s brother. How is T related to U?
Solution:

Given that,
S and T are brothers.
U and V are sisters.
S’s son is V’s brother.
Clearly, T is the brother of S, S’s son is V’s brother. So, this means V is the daughter of S. Since U and V are sisters. U is also the daughter of S.
Therefore, T is the uncle of U.

Model 3: George is son of John’s father’s sister. Jack is son of Grace who is mother of Andrew and grandmother of John. Benton is father of Alice and grandfather of George. Grace is wife of Benton. By reading the given data carefully, answer the following questions.
1. How is George related to Grace?
2. How is Andrew’s wife related to Alice?
Solution:

1. Grace is wife of Benton, and Benton is grandfather of George. So, George is Grace ‘s grandson.
2. Alice is Benton’s daughter, Andrew is Grace’s son and Benton is Grace’s husband. So, Andrew is Alice’s brother and his wife is Alice’s sister-in-law.

Model 4: Read the paragraph below and answer the questions.
‘E + F’ means ‘E is the son of F’, ‘E – F’ means ‘E is the wife of F’, ‘E x F’ means ‘E is the brother of F’, ‘E ÷ F’ means ‘ E is the mother of F’ and ‘E = F’ means ‘E is the sister of F’.
1. What does S = T + U mean?
2. What does S + T – U mean?
3. What does S = T ÷ U mean?
4. What does S x T ÷ U mean?
Solution:

1. S = T + U means S is the sister of T who is the son of U i.e. S is the daughter of U.
2. S + T – U means S is the son of T who is the wife of U i.e. S is the father of U.
3. S = T ÷ U means S is the sister of T who is the mother of U i.e. S is the aunt of U.
4. S x T ÷ U means S is the brother of T who is the mother of U i.e. S is the uncle of U.

Model 5: If ‘A + B’ means ‘A is the father of B’, ‘A x B’ means ‘A is the brother of B’, ‘A – B’ means ‘A is the mother of B’, then what does R – P + Q mean?
Solution:

Given that
‘A + B’ means ‘A is the father of B’.
‘A – B’ means ‘A is the mother of B’.
Now,
‘R – P + Q’ means ‘R is the mother of P who is the father of Q’.
Therefore, P is male and hence the son of R.
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