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Answer:
1. Arithmetic Problem:
If a man invests PHP 10,000 at an annual interest rate of 5%, what will be the amount of interest earned after 3 years?
2. Ratio and Proportion:
If the ratio of boys to girls in a class is 4:5 and there are 45 students in total, how many boys are there in the class?
3. Percentage:
A store offers a 20% discount on a jacket originally priced at PHP 1,500. What is the sale price of the jacket?
4. Algebra:
Solve for \( x \): \( 3x + 7 = 22 \).
5. Geometry:
What is the area of a rectangle with a length of 8 cm and a width of 5 cm?
6. Time and Work:
If a team of 5 workers can complete a task in 12 days, how many days will it take for 10 workers to complete the same task, assuming they work at the same rate?
7. Simple Interest:
What is the simple interest earned on PHP 8,000 for 2 years at an annual interest rate of 4%?
8. Basic Statistics:
Find the average of the following numbers: 12, 15, 20, 25, and 18.
9. Speed and Distance:
If a car travels 180 kilometers in 3 hours, what is its average speed in kilometers per hour?
10. Profit and Loss:
If an item is bought for PHP 750 and sold for PHP 900, what is the percentage profit made on the item?
These questions cover a range of mathematical topics that are commonly tested in civil service exams.