An alloy of copper and zinc is taken in the ratio $1: 2$,and another alloy of the same metals is taken in the ratio of $2: 3$. How many parts of the two alloys must be taken to obtain a new alloy consisting of copper and zinc that are in the ratio $3: 5$?

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

There is a ratio of $5:4$ between two numbers. If $40\%$ of the first number is $12$,then $50\%$ of the second number is:

The ratio of three numbers is $2: 3: 5$. If the sum of the three numbers is $275$,then what is the largest among the three numbers?

Three numbers $A, B$ and $C$ are in the ratio of $12: 15: 25$. If the sum of these numbers is $312$,find the ratio between the difference of $B$ and $A$ and the difference of $C$ and $B$.

$A$ sum of ₹ $15525$ is divided among Sunil,Anil and Jamil such that if ₹ $22$,₹ $35$ and ₹ $48$ be diminished from their shares respectively,their remaining sums shall be in the ratio $7: 10: 13$. What would have been the ratio of their sums if ₹ $16$,₹ $77$ and ₹ $37$ respectively were added to their original shares?