Question

'$P+Q$' means $P$ is the brother of $Q$
'$P-Q$' means $P$ is the mother of $Q$ and

'$P\times Q$' means $P$ is the sister of $Q$
Which of the following means that $M$ is the maternal uncle of $R$ ?

• A. $M-R+K$
• B. $M+K-R$
• C. $M+K\times Q$
• D. None of these

Answer 1

The correct option is B $M+K-R$

option A:

$M-R+K$

means $M$ is the mother of $R$, who is the brother of $K$

$\Rightarrow$ $M$ is the mother of $R$ and $K$.

option B:

$M+K-R$

means $M$ is the brother of $K$, who is the mother of $R$

$\Rightarrow$ $M$ and $K$ are brother-sister and $K$ is the mother of $R$.

So $M$ is $R$'s maternal uncle.

option C:

$M+K\times Q$

means $M$ is the brother of $K$, who is the sister of $Q$

$\Rightarrow$ $M$ , $K$ and $S$ are siblings.

So, the relation in option B gives the desired conclusion.