Question

If $a + b$ means $a$ is sister of $b$, $a - b$ means $a$ is brother of $b$, $a 	imes b$ means $a$ is daughter of $b$, $a \div b$ means $a$ is mother of $b$, Which of the following relationship shows that $p$ and $r$ are wife and husband?

Accepted Answer

A. For option A ($p \div q 	imes r$): $p \div q \implies p$ is mother of $q$ (female). $q 	imes r \implies q$ is daughter of $r$. Since $q$ is daughter of both mother $p$ and $r$, $r$ must be $q$'s father (husband of $p$). Thus $p$ and $r$ are wife and husband.

Blood relation coded equation

Explanation

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