Question : 70% of the cost price of an article is equal to 40% of its selling price. What is the profit or loss percent?

Question : A tradesman marks his goods at 25% above the cost price. If he reduces the marked price by $12\frac{1}{2}\%$, then his profit will be:

Question : If $\sin(A+B)=\sin A\cos B+\cos A \sin B$, then the value of $\sin75°$ is:

Question : Mohan purchased a bag with a 20% discount on the labelled price. He sold it at a 40% profit on the price he bought. The percentage of profit on the labelled price is:

Question : If $(r\cos \theta -\sqrt{3})^{2}+(r\sin \theta -1)^{2}=0$, then the value of $\frac{r\tan \theta +\sec \theta}{r\sec \theta +\tan\theta}$ is equal to: