‘Z + Y’ means ‘Z is the father of Y’
‘Z – Y’ means ‘Z is the mother of Y’
‘Z × Y’ means ‘Z is the brother of Y
’ ‘Z ÷ Y’ means ‘Z is the sister of Y’.
What does ‘A × B – C’ mean?
1
A is the father’s father of C
2
A is the father’s brother of C
3
A is the father of C
4
A is the mother’s brother of C