A + B means ‘A is the father of B’:

A - B means 'A is the wife of B’,

A × B means 'A is daughter of B',

A ÷ B means ‘A is the son of B’.

If J × K + L ÷ M, then how is M related to J?

Mother

ATQ,

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Please note:

  l   ⇒ Vertical line shown "generation gap".

 =  ⇒ Double lines shown "relation of spouse" 

—  ⇒ Horizontal line shown "relation in same generation other than spouse".

     ⇒ Rectangular box shown " Male".

     ⇒ Circular box shown " Female".

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