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ABHYAS PREP: REASONING PUZZLES · BLOOD RELATIONS (CODED)

Coded blood relations (symbols for relations)

Decode each symbol into one link, draw the family tree (+ for male, − for female, a horizontal line for a couple, a vertical line for a generation), then read the asked relation. If the asked person’s gender is never fixed, the answer is “cannot be determined”.

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Worked examples

Example 1 · level 1

In a certain code: "A © B" means A is the sister of B. "A % B" means A is the mother of B. "A @ B" means A is the father of B. "A × B" means A is the husband of B. If K × W % P % L, how is K related to L?

  1. Cannot be determined
  2. Father
  3. Grandmother
  4. Grandfather
Show solution
  1. K × W: K is the husband of W.
  2. W % P: W is the mother of P.
  3. P % L: P is the mother of L.
  4. K is male (K is called the husband of W).
  5. K is L’s grandparent → Grandfather.

Answer: Grandfather

Example 2 · level 2

In a certain code: "A × B" means A is the son of B. "A ~ B" means A is the sister of B. "A # B" means A is the daughter of B. "A $ B" means A is the mother of B. "A % B" means A is the husband of B. "A © B" means A is the brother of B. If G © E × N ~ U, how is U related to G?

  1. Uncle
  2. Aunt
  3. Cannot be determined
  4. Nephew
Show solution
  1. G © E: G is the brother of E.
  2. E × N: E is the son of N.
  3. N ~ U: N is the sister of U.
  4. U’s gender is never fixed by any code.
  5. U is G’s uncle or aunt → Cannot be determined.

Answer: Cannot be determined

Example 3 · level 3

In a certain code: "A × B" means A is the brother of B. "A − B" means A is the son of B. "A % B" means A is the wife of B. "A # B" means A is the sister of B. "A ~ B" means A is the father of B. "A * B" means A is the mother of B. "A @ B" means A is the daughter of B. "A + B" means A is the husband of B. If W @ S × G @ E * D, how is D related to W?

  1. Cannot be determined
  2. Aunt
  3. Niece
  4. Uncle
Show solution
  1. W @ S: W is the daughter of S.
  2. S × G: S is the brother of G.
  3. G @ E: G is the daughter of E.
  4. E * D: E is the mother of D.
  5. D’s gender is never fixed by any code.
  6. D is W’s uncle or aunt → Cannot be determined.

Answer: Cannot be determined

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