$34.5 \% \text{ of } 1800 + 12.4 \% \text{ of } 1500 = (?)^3 + 78$

The product of one-third of a number and $150 \%$ of another number is what percent of the product of the given numbers?

Which is the greatest number?

Out of $450$ students of a school,$325$ play football,$175$ play cricket and $50$ neither play football nor cricket. How many students play both football and cricket?

When the price of an article is reduced by $15 \%$,the sales increase by $35 \%$. The percentage change in the total amount of receipts is:

If $60 \%$ of $A = 30 \%$ of $B$,$B = 40 \%$ of $C$ and $C = x \%$ of $A$,then the value of $x$ is: