Shyam Saraf and Abhilasha Swarup Solutions for Exercise 1: EXERCISE

 A reduction of $25\mathrm{\%}$ in the price of apples enables a purchaser to get two dozens more for $\mathrm{₹}40$. Find the reduced price per dozen.

In a test, Kalicharan scored $40\mathrm{\%}$ in the first paper out of a total of $150$. How much minimum marks should he score in the second paper (out of $200$), if $60\mathrm{\%}$ marks are needed to qualify the written exam?

A $60$ litres solution contains $50\mathrm{\%}$ milk and the remaining is water. How much water should be added so that the percentage of water becomes $75\mathrm{\%}$?

If $2$ litres of water is evaporated from $20$litres of a solution containing $15\mathrm{\%}$ sodium, then find the percentage of sodium in the remaining solution.

A's income is $50\%$ more than B's income. By what percent is B's income is less than A's income?

The price of a motorcycle is increased by $20\mathrm{\%}$. By what percent its production must be decreased to maintain the same expenditure?

If $\mathrm{x}$ is $\mathrm{x}\mathrm{\%}$ of $\mathrm{y}$ and $\mathrm{y}$ is $\mathrm{y}\mathrm{\%}$ of $\mathrm{z}$, where $\mathrm{x}$ is a positive real number, then what is the value of $\mathrm{z}$?

$25\mathrm{\%}$ of $40\mathrm{\%}$ of $71.42\mathrm{\%}$ of a number equals $100$. Find the number.