Quantitative Aptitude
A person borrowed some money on simple interest. After 4 years, he returned \(\frac{9}{5}\) of the money to lender. What was the rate of interest?
Every month, a man consumes 20 kg of rice and 8 kg of wheat. The price of rice is 20% of the price of wheat, resulting in a total expenditure of ₹300 per month for rice and wheat combined. If the price of wheat is increased by 20%, what percentage reduction in rice consumption is needed to maintain the same expenditure of ₹300?
(Given that price of rice and consumption of wheat is constant.)
The given table shows the production of iron rods by a company for a period of 6 months. Study the table and answer the questions that follows.
| Month | January | March | May | July | September | November |
| Production | 60 | 75 | 45 | 85 | 90 | 108 |
What is the ratio of the month having the highest production to the month having the least production?
Solve the following
\(\left[(2.5 + 1.5)^2 \div 4 \text{ of } \frac{1}{2} \times 8 - 1\right]\)
The following pie chart shows the study time of different subjects of a student in a day. Study the pie chart and answer the question.
If the student studied English for 3 hours, then he studied Mathematics for:
Two cylinders have the radii of their bases in the ratio 4 : 5 and their heights are in the ratio 5 : 7. Find the ratio of their curved surface areas.
Solve the following:
\(\frac{1}{1 + \cos\theta} + \frac{1}{1 - \cos\theta} = ?\)