Verbal Reasoning - Blood Relation Test - Discussion

Hi, I didn't understand this topic, please help me!

I didn't understand it, can you please explain me clearly ?

a+b = a mother of b.

a-b = a brother b.

a%b = a father b.

a*b = a sister b.

p maternal uncle of q = ?

q-n = q brother n.

n+m = n mother m.

m*p = m sister p.

(m sister p) daughter of n (n is brother q) here (q is maternal uncle p) opposite to the question. So not correct.

p+s = p mother of s.

s*n = s sister of n.

n-q = n brother of q.

Here (s, n, q are brother and sister) and their (mother is p). So not correct.

p-m = p brother of m.

m+n = m mother of n.

n*q = n sister of q.

Here (n and q sister) their (mother is m) and (p and m) are brother and sister (brother of m is maternal uncle of q). So it is correct answer.

Have anybody any formula for this type of question?

Any shortcut?

I don't know, why alphabets are changed in answers?

Please explain me.

The answer could just be->P-M+Q.

N''-----> Q.
|
|
|
M''------>P.

Friends mostly this kind of questions option is A or A option values change means in place of Q he give P and in place of P he give Q like that.

Can anybody draw the diagram?

Why can't it be P-M+Q?