Question 17 of 18 · Blood Relations
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NIMCET 2024

Looking at the portrait of a man, Lucky (male) said, \"This person is the only child of my paternal grandmother's daughter.\" Whose portrait was Lucky looking at?

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Answer: Option B — His cousin

Detailed Solution

In blood-relation diagrams, a square with '+' is male (blue), a circle with '−' is female (pink), and a grey triangle means the gender is not given. G = grandmother, F = father, A = aunt, L = Lucky, P = man in the portrait.

1

Lucky's paternal grandmother is his father's mother. Her daughter is his father's sister, Lucky's aunt.

2

The only child of Lucky's aunt is Lucky's cousin.

figure

✓ Check

Lucky is the child of the grandmother's son (his father), not of her daughter, so the portrait cannot be Lucky himself.

⚠ Common trap

(D) Himself would need the grandmother's daughter to be Lucky's mother, but this is his father's mother, so her daughter is his aunt.

Quick tip

Paternal grandmother's daughter is the father's sister (aunt); her child is a cousin

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More Blood Relations Questions

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  1. Q1.'A + B' means 'A is the son of B'. 'A − B' means 'A is the wife of B'. 'A × B' means 'A is the father of B'. 'A ÷ B' means 'A is the sister of B'. If A + P − Q × R − S, then which of the following statements is NOT correct?
  2. Q2.Mira's mother-in-law's mother is my grandmother. All my mother's offspring are unmarried till date. Based on this, which of the following is true?
  3. Q3.Seven people of a family P1, P2, P3, P4, P5, P6 and P7 go on a picnic in a sports utility vehicle. P4 is the sister of P7. P2 is the mother of P6's wife. P6 is the son-in-law of P3. P5 and P7 are the grandsons of P3. Two people in that group of 7 are fathers, two are brothers, two are mothers and one is a sister. What is the relationship between P1 and P4?
  4. Q4.Pointing to a woman, Arun says: "She is the daughter of my father's only son." How is the woman related to Arun?
  5. Q5.Pointing towards a person in a photograph, Anjali said, "He is the only son of the father of my sister's brother." How is that person related to Anjali?

More Logical Reasoning Questions

  1. Q1.Six persons A, B, C, D, E, and F are sitting in a row facing north. B sits third to the left of F. A sits to the immediate right of B. D sits second to the right of F. E sits to the immediate right of A. Who sits at the extreme right end?Linear Arrangement
  2. Q2.Five friends P, Q, R, S, and T are standing in a row. P is to the left of Q but to the right of T. R is to the right of Q. S is between Q and R. Who is standing in the middle?Linear Arrangement
  3. Q3.Eight people 1 through 8 sit in a row. 3 sits exactly midway between 1 and 5. 5 sits to the immediate left of 7. 2 sits third to the right of 8. 6 sits to the immediate right of 2. 4 sits between 6 and 7. Who sits second from the left?Linear Arrangement
  4. Q4.A, B, C, D, and E are five houses in a row from left to right. C is to the right of B and to the left of E. A is to the left of B. D is to the right of E. Which house is in the middle?Linear Arrangement
  5. Q5.Seven students sit in a row. Priya is second from the right. Raj is third to the left of Priya. Meena is immediately to the right of Raj. Sam is between Meena and Priya. Two students sit to the left of Raj. Who sits at the extreme left?Linear Arrangement

Blood Relations — Preparation

This question tests your understanding of Blood Relations, a key topic in the Logical Reasoning section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.

Blood relation questions describe family relationships and ask you to work out how two people are related. This topic covers direct statements ("A is the brother of B"), puzzle-style family descriptions, pointing-to-a-photograph questions, and coded relations where symbols stand for relationships (for example, A + B means A is the father of B). The most reliable method is to draw a family tree. Use a square for males, a circle for females, horizontal lines for the same generation and vertical lines for parent and child. Never assume a person's gender from their name, and only use what the question states. Drawing the tree step by step prevents most errors, especially in questions involving three or more generations. Practise the blood relation questions below. Each solution includes a family tree diagram.