What must be added to each term of the ratio $2:5$ so that it may equal to $5:6$?

The ratio of two numbers is $3:4$ and their $LCM$ is $180$. The second number is:

An amount of ₹ $1200$ is distributed among $A, B$ and $C$ in the ratio of $5: 7: 13$. What is the difference between the shares (in ₹) of $C$ and $B$?

The ratio of the sum of two numbers and their difference is $5:1$. The ratio of the greater number to the smaller number is

$A$ mixture of milk and water is kept in two separate containers. The ratio of milk to water in one container is $5:1$ and in the other container is $7:2$. In what ratio should the mixtures from these two containers be mixed so that the quantity of milk in the new mixture becomes $80\%$?

How many one-rupee coins,$50$-paise coins,and $25$-paise coins,whose numbers are in the ratio $5:7:12$,are together worth $₹ 115$?