The total marks obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What are average marks obtained by him in physics and Mathematics together?

In $2003$, the total population of a village was $4800$, out of which $40\%$ were females. In $2004$, the total population increased by $10\%$ as compared to the previous year. If the number of females remained the same in $2004$, what was the percentage increase in the number of males in $2004$ as compared to $2003$?

One-third of $1206$ is what percent of $134$?

Divide $₹7000$ among $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ such that $\mathrm{A}$ gets $50\%$ of what $\mathrm{B}$ gets and $\mathrm{B}$ gets $50\%$ of what $\mathrm{C}$ gets.

An alloy contains $40\%$ copper, $32\%$ nickel and rest zinc. Find the mass of zinc in one kg of the alloy.

Balanced diet should contain $12\%$ of proteins, $25\%$ of fats and $63\%$ of carbohydrates. If a child needs $2600$ calories in his food daily, find in calories the amount of each of these in his daily food intake.

Express: $56\%$ as a ratio.

$x\%$ of $y$ is $y\%$ of?