Choose the correct option to fill in the blank: She is good ………….. mathematics.
The correct preposition used with the adjective good is at. Correct sentence: \[ \text{She is good at mathematics.} \]
What is the simple interest on ₹2000 at 5% per annum for 2 years?
If the cost price of an article is ₹500 and it is sold at a profit of 10%, what is the selling price?