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Reasoning Ability
Blood Relations

Critical thinking and logical reasoning questions

22 Q 8 Topics Take Mock Test
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Difficulty: All Easy Medium Hard 11–20 of 22
Topics in Reasoning Ability
Q.11 Medium Blood Relations
Statements: All engineers are logical. Some logical people are creative. Conclusion: All engineers are creative. Is this valid?
A Valid
B Invalid
C Cannot determine
D Partially valid
Correct Answer:  B. Invalid
EXPLANATION

Being logical doesn't guarantee being creative. Some logical people are creative doesn't extend to all engineers.

Test
Q.12 Medium Blood Relations
Five people P, Q, R, S, T are sitting in a row. R is in the middle. P and Q are on the left of R. T is to the right of R. S is between Q and R. Who is sitting second from the left?
A Q
B S
C R
D P
Correct Answer:  A. Q
EXPLANATION

Order: P-Q-S-R-T. Second from left is Q.

Test
Q.13 Medium Blood Relations
If MOUNTAIN = 13-15-21-14-20-1-9-14, how many letters in the code have odd position values?
A 3
B 4
C 5
D 6
Correct Answer:  C. 5
EXPLANATION

Odd values: 13(M), 21(U), 15(O), 1(A), 9(I) = 5 letters with odd position values.

Test
Q.14 Medium Blood Relations
In a family, X is the sister of Y. Y is the brother of Z. Z is the father of W. How is X related to W?
A Aunt
B Grandmother
C Mother
D Sister
Correct Answer:  A. Aunt
EXPLANATION

X is sister of Y. Y is brother of Z (so Z is also sibling of X). Z is father of W. Therefore, X is aunt of W.

Test
Q.15 Medium Blood Relations
All smartphones are electronic devices. Some electronic devices are expensive. Conclusion: Some smartphones are expensive. Is this conclusion valid?
A Valid
B Invalid
C Cannot be determined
D Partially valid
Correct Answer:  B. Invalid
EXPLANATION

The conclusion does not follow logically. Some electronic devices being expensive doesn't guarantee smartphones are included in that some.

Test
Q.16 Medium Blood Relations
In a family, there are 6 members: A, B, C, D, E, F. A is married to B. C and D are children of A and B. E is married to C. F is the child of C and E. Who is the mother-in-law of E?
A A
B B
C C
D F
Correct Answer:  B. B
EXPLANATION

E is married to C. C is the child of A and B. B is the mother of C. Therefore, B is the mother-in-law of E.

Test
Q.17 Medium Blood Relations
Statement: All doctors are professionals. Some professionals are not ethical. Conclusion: Some doctors are not ethical.
A Definitely true
B Definitely false
C Cannot be determined
D Possibly true
Correct Answer:  C. Cannot be determined
EXPLANATION

All doctors are professionals (given). Some professionals are not ethical (given). But it's possible that the unethical professionals are not doctors. Conclusion cannot be determined.

Test
Q.18 Medium Blood Relations
If all roses are flowers, and some flowers are red, which of the following must be true?
A All roses are red
B Some roses are red
C No roses are red
D We cannot determine if any roses are red
Correct Answer:  D. We cannot determine if any roses are red
EXPLANATION

All roses are flowers (true). Some flowers are red (true). But this doesn't guarantee roses are among those red flowers.

Test
Q.19 Medium Blood Relations
Pointing to a photograph, Arun said, 'He is the son of my mother's only son.' Who is the person in the photograph?
A Arun's father
B Arun himself
C Arun's son
D Arun's brother
Correct Answer:  C. Arun's son
EXPLANATION

My mother's only son = myself (Arun). So the person is the son of Arun = Arun's son.

Test
Q.20 Medium Blood Relations
In a family of five members, P is the father of Q and R. Q is the mother of S. T is the brother of P. How many males are there in the family?
A 2
B 3
C 4
D Cannot be determined
Correct Answer:  D. Cannot be determined
EXPLANATION

P is male (father). T is male (brother). R's gender unclear. S's gender unclear. Q is female (mother). Insufficient information.

Test
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