$A$ father is now $3$ times as old as his son. $5$ years back,he was $4$ times as old as his son. The age of the son is:

$A$ man's age is $125 \%$ of what it was $10 \, \text{years}$ ago, but $83 \frac{1}{3} \%$ of what it will be after $10 \, \text{years}$. What is his present age? (in $\text{years}$)

The ratio of the present ages of Anju and Sandhya is $13: 17$. $4$ years ago,the ratio of their ages was $11: 15$. What will be the ratio of their ages $6$ years hence?

Jayesh is as much younger to Anil as he is older to Prashant. If the sum of the ages of Anil and Prashant is $48 \text{ years}$,what is the age of Jayesh? (in $years$)

If twice the son's age be added to the father's age,the sum is $70 \text{ years}$ and if twice the father's age is added to the son's age,the sum is $95 \text{ years}$. Then the father's age is (in $\text{years}$):

$A$ man is $3 \, \text{years}$ older than his wife and four times as old as his son. If the son becomes $15 \, \text{years}$ old after $3 \, \text{years}$, what is the present age of the wife? (in $\text{years}$)