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Difficulty: Very hardBlood Relations

Study the following coded relationships carefully:

- P+QP + Q means 'PP is the mother of QQ'
- P−QP - Q means 'PP is the brother of QQ'
- P×QP \times Q means 'PP is the husband of QQ'
- P÷QP \div Q means 'PP is the sister of QQ'
- P⋆QP \star Q means 'PP is the son of QQ'

Based on the expression U+V×W÷X⋆Y−ZU + V \times W \div X \star Y - Z, which of the following statements is DEFINITELY correct?

  1. VV is the son-in-law of YYAnswer
  2. B
    ZZ is the paternal uncle of WW
  3. C
    UU is the maternal grandmother of XX
  4. D
    WW is the sister-in-law of ZZ

Answer

The statement 'VV is the son-in-law of YY' is definitely correct.
Breaking down the expression step-by-step: V×WV \times W confirms VV (male) is married to WW (female). W÷X⋆YW \div X \star Y indicates WW and XX are siblings, and XX is the son of YY, meaning YY is a parent of WW. Y−ZY - Z establishes that YY is a male (brother of ZZ), so YY is the father of WW. Since VV is the husband of WW and YY is the father of WW, VV is definitely the son-in-law of YY.

Step-by-Step Solution

1
Decode U+VU + V and V×WV \times W
UU is female (mother of VV). VV is male (husband of WW), and WW is female (wife of VV).
Establishes the married couple (V,W)(V, W) and VV's mother UU.
2
Decode W÷X⋆YW \div X \star Y
WW is the sister of XX, and XX is the son of YY.
Since WW and XX are siblings and XX is YY's son, YY is the parent of both WW and XX.
3
Decode Y−ZY - Z
YY is the brother of ZZ.
Since YY is male and a parent of WW (who is female), YY is the father of WW. ZZ is a sibling of father YY, but ZZ's gender remains unknown.
4
Synthesize the relationship between VV and YY
VV is married to WW, and YY is WW's father. Therefore, VV is YY's son-in-law.
Deduces the exact relationship between VV and YY with 100% certainty.

Key Concept

Coded Blood Relations and Gender Deductions
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Topics

Blood Relations

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