Answer :
her age is 37 because if we calculate her son's age with mrs lim the answer will be 37
Y will be 37 as
Mrs Lim was 25 years old when her son was born so after 12 years it's simply 12+25 or 37
and N will be 12+37 or
49
Mrs Lim was 25 years old when her son was born so after 12 years it's simply 12+25 or 37
and N will be 12+37 or
49