‘A + B’ means ‘A is the brother of B’.
‘A – B’ means ‘A is the sister of B’.
‘A × B’ means ‘A is the father of B’.
‘A ÷ B’ means ‘A is the mother of B’.
Using the same meaning of the mathematical operators as given above, which of the following shows ‘P is the father’s father of S’?
1
P + Q – R ÷ S
2
P – Q + R ÷ S
3
P × Q × R + S
4
P + Q ÷ R × S