Fill in the blank with the correct option.
The teacher believed that the student’s sudden lack of interest in class was an ..........., as he had always been enthusiastic and attentive.
Choose the correct option to fill in the blank: She is good ………….. 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?