Question

$A+B$ means '$A$ is the brother of $B$';

$A-B$ means '$A$ is the mother of $B$'.

$A\times B$ means '$A$ is the sister of $B$'

Which of the following means $A$ is the maternal uncle of $B$ ?

• A. $A+C+B$
• B. $A-B+C$
• C. $A+C-B$
• D. $A+C\times B$

Answer 1

Answer: (C)

$A+C-B$

option A:

$A+C+B$

means $A$ is the brother of $C$ who is the brother of $B$.

option B:

$A-B+C$

means $A$ is the mother of $B$ who is the brother of $C$

option C:

$A+C-B$

means $A$ is the brother of $C$ who is the mother of $B$.

$\Rightarrow$ $A$ is the maternal uncle of $C$

option D:

$A+C\times B$

means $A$ is the brother of $C$ who is the sister of $C$.

Opton C gives the desired relation between $A$ and $B$.