Two numbers are in the ratio $3: 5$. If each number is increased by $10$,the ratio becomes $5: 7$. The numbers are:

Sachin is younger than Rahul by $4$ years. If their ages are in the respective ratio of $7:9$,how old (in years) is Sachin?

One year ago,the ratio between Ram's and Shyam's salaries was $3:5$. The ratios of their individual salaries of last year to the present year are $2:3$ and $4:5$ respectively. If their total salary for the present year is $Rs. 8600$,find the present salary of Ram (in $Rs.$)?

In a bag,there are coins of $25 p$,$10 p$,and $5 p$ in the ratio of $2:3:4$. If there is $Rs. 50$ in all,how many $5 p$ coins are there?

$A, B$ and $C$ received an amount of ₹ $8400$ and distributed it among themselves in the ratio of $6: 8: 7$ respectively. If they save in the ratio of $3: 2: 4$ respectively and $B$ saves ₹ $400$,then what is the ratio of the expenditures of $A, B$ and $C$ respectively?

Three numbers are in the ratio of $3:4:5$. The sum of the largest and the smallest equals the sum of the second and $52$. The smallest number is