Question

$\large\rm \red{Logic \: Question :- }$
$\: \: \: \: \:$
If ‘P + Q’ means P is the brother of Q ; ‘P - Q’ Means P is the Mother Of O ; ‘P × Q’ Means P is the sister Of Q , Then Which Will Of the following Means ‘M is the Materval under R’

$\large \rm \red{Options :-}$
1. M - R + K
2. M + K - R
3. M + K + Q
4. M - K - R

$\large \sf \purple{Explanation \: Needed.}$
​

Answer 1

Answer:

'P + Q' means 'P is the mother of Q; 'P – Q' means 'P is the brother of Q'. 'P * Q' means 'P is the sister of Q'. Explanation:A + B # C – D means A is the mother of B, who is the father of C, who is the brother of D, i.e., A is grandmother of D.

Answer 2

$\\\;\underbrace{\underline{\sf{Understanding\;the\;Concept\;:-}}}$

Here the Concept of relations has been used. We see we are given the relation due to symbols like + , - and × . Using these symbols, we can apply this in the given case to find the relation. Since we need to find the maternal uncle of R so we need to convert relation in terms of R.

Let's do it !!

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★ Correct Question :-

If ‘P + Q’ means P is the brother of Q ; ‘P - Q’ Means P is the Mother Of O ; ‘P × Q’ Means P is the sister Of Q , Then Which Will Of the following Means ‘M is the Maternal uncle of R’.

$\large \rm \red{Options :-}$

1. M - R + K

2. M + K - R

3. M + K + R

4. M - K - R

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★ Solution :-

Given,

» P + Q = P is the brother of Q

» P - Q = P is the mother of Q

» P × Q = P is the sister of Q

This means,

• + shows relation of Brother

• - shows relation of Mother

• × shows relation of Sister

Now we need to find a relation that shows M is the Maternal Uncle of R.

Let's see have a trial and error method on each options. We will be following the rule of BODMAS that is first multiplication then addition and then subtraction here.

$\\\;\;\rm{1.)\;\;\green{M\;-\;R\;+\;K}}$

Here we see that its given R + K which means R is the brother of K. And M - R + K means M is the mother of R and K who are brothers.

So this is wrong option.

$\\\;\;\rm{2.)\;\;\green{M\;+\;K\;-\;R}}$

Here we see that its given M + K which shows that M is the brother of K. And K - R shows that K is the mother of R. And we know that Brother of Mother is Maternal Uncle. This shows M is the maternal uncle of R.

Hence, this option is correct.

$\\\;\;\rm{3.)\;\;\green{M\;+\;K\;+\;R}}$

Here we see that M + K shows that M and K are brothers. And K + R shows that R is the brother of K . Hence, M, K and R are brothers.

Hence, this option is wrong.

$\\\;\;\rm{4.)\;\;\green{M\;-\;K\;-\;R}}$

Here we see that M - K shows that M is the mother of K. And K - R shows that K is the mother of R. Hence, M is the maternal grandmother of R and K is the mother of R.

Hence, this option is wrong.

✒ So the correct option is 2.)

$\\\;\underline{\boxed{\tt{Correct\;\;Relation\;=\;\bf{\purple{M\;+\;K\;-\;R}}}}}$