Solving Blood Relations Reasoning Questions

Blood relations questions test your ability to understand and interpret relationships between family members based on given codes or information. To solve these, we break down the given expression step-by-step using the provided rules.

Understanding the Code Language

Here are the given rules for decoding the relationships:

• A + B means ‘A is husband of B’
• A – B means ‘A is son of B’
• A × B means ‘A is mother of B’
• A ÷ B means ‘A is sister of B’

Decoding the Expression: P – K + D × S ÷ T

Let's break down the given expression piece by piece, from left to right, to determine the relationships between the individuals P, K, D, S, and T.

1. P – K: According to the rule A – B means ‘A is son of B’, this means P is the son of K. This tells us P is male.
2. K + D: According to the rule A + B means ‘A is husband of B’, this means K is the husband of D. This tells us K is male and D is female. Since P is the son of K, and K is the husband of D, D must be the wife of K, and thus the mother of P. So, K and D are the parents of P.
3. D × S: According to the rule A × B means ‘A is mother of B’, this means D is the mother of S. We already know D is the mother of P. Since D is the mother of both P and S, P and S must be siblings, sharing parents K and D.
4. S ÷ T: According to the rule A ÷ B means ‘A is sister of B’, this means S is the sister of T. This tells us S is female. Since S is the sister of T, S and T are siblings.

Establishing the Family Connections

Let's summarize the relations we've found:

• P is the son of K. (P is male)
• K is the husband of D. (K is male, D is female)
• D is the mother of S. (D is female)
• S is the sister of T. (S is female)

Combining these points:

• K and D are a married couple.
• P is their son.
• S is their daughter (since D is mother of S and K is husband of D, K is father of S).
• P and S are siblings, as they share parents K and D.
• S and T are siblings.

Since P is a sibling of S, and S is a sibling of T, it follows that P and T are also siblings. They share the same parents, K and D.

Determining the Relation of P to T

The question asks: "how is P related to T?". We know P and T are siblings. From the first step (P – K), we established that P is the son of K. Being a son means P is male.

Therefore, P is the brother of T.

Let's visualize the family structure:

Conclusion

Based on the decoding of the expression P – K + D × S ÷ T, we determined that P is the son of K and D, and S is the daughter of K and D, and S is the sister of T. This establishes P and T as siblings. Since P is male (son of K), P is the brother of T.

Revision Table: Blood Relations Symbols

Additional Information: Tips for Solving Blood Relations Problems

Blood relations questions can appear in various formats, including coded relations like this example, or as narrative descriptions. Here are some general tips:

• Draw a Family Tree: For narrative problems, drawing a simple diagram or family tree helps visualize the relationships and avoid confusion.
• Break Down Complex Expressions: For coded relations, analyze the expression step-by-step from left to right or right to left as appropriate.
• Determine Gender: Pay close attention to symbols or phrases that indicate gender (e.g., 'son', 'daughter', 'husband', 'wife', 'brother', 'sister'). This is crucial for determining the exact relationship.
• Identify the Subject and Object: In "A is the relation of B", A is the subject and B is the object. Make sure you answer who is related to whom as asked in the question (e.g., "How is P related to T?" means find P's relation to T).
• Practice: Solving various types of blood relation problems helps you become familiar with common pitfalls and improve your speed and accuracy.

Understanding the basic family relationships (parents, siblings, grandparents, aunts, uncles, cousins, in-laws) is fundamental to solving these reasoning questions.