A + B means B is brother of A; A × B means B is husband of A; A – B means A is mother of B; and A ÷ B means A is father of B. Then which of the following expressions indicates 'P' is grandmother of 'T'?

Question

Accepted Answer

(c) is ruled out because we need two generation-change signs (– and ÷) between P and T. Same is the case with (a). Again, (d) is ruled out because P + Q does not give the sex of P. Now, check (b)
(P) (-) ⟷ Q (+)
          ↓
          R(-)
          ↓
          T

A + B means B is brother of A; A × B means B is husband of A; A – B means A is mother of B; and A ÷ B means A is father of B. Then which of the following expressions indicates 'P' is grandmother of 'T'?

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