The average age of Abhay, his wife and their child 6 years ago was 42 years and that of his wife and their child 8 years ago was 30 years. Find the present age of Abhay.

68 years

ATQ,

Sum of age of the family, 6 years ago = 42 x 3 = 126

Present sum of age of the family = 126 + 18 =144

Sum of wife and child's age, 8 years ago = 30 x 2 = 60

Present sum of wife and child's age = 60 + 16 = 76

Present age of Abhay = 144 - 76 = 68 years