Problems on Ages Hard Level

A's present age equals the sum of the present ages of B and C. Ten years ago, A's age was double the sum of B's and C's ages then. How old is A?

Raju and his sister are 30 years old together. Five years ago the product of their ages was 96. How old is the elder of the two?

A is now twice as old as B. Eight years from now A will be one and a half times as old as B. How old is A now?

Ramesh's present age is 6 years more than twice his son's. Four years ago he was 3 times as old as his son was then. How old is Ramesh?

Four years ago the ratio of A's age to B's age was 11 : 14. Four years from now A will be 3 years younger than B. How old is A now?

A is 4 years younger than B. Eight years from now the ratio of their ages will be 6 : 7. How old is A now?

A mother is 25 years older than her son. Four years ago she was twice as old as he was. How old is the mother now?

A person's age 12 years ago was two-thirds of what his age will be 12 years from now. What is his present age?

A woman has three children born 3 years apart. The youngest is one-third as old as the eldest. What is the sum of the children's ages?

A man is 6 times as old as his son. After 20 years he will be twice as old as his son. How old is the man now?