2O years ago,when my parents got married,their average age was `"23"` years,now the average age of my family,consisting of myself and my parents only is `"35"` years.My present age is .

The average age of 7 members of Patel's family is 25 years. The average age of the same family 3 years ago was :

Four years ago, the average age of A and B was 18 years. Now the average age of A, B and C is 24 years. After 8 years, the age of C will be

5 years ago the average age of a family which includes father, mother and a son was 35 years. 3 years ago the average age of father and mother was 46 years. What is the present age (in years) of the son?