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1. A man rowed 16 upstream in 4 hours. If the river flowed with a current of 2 kph, how long did the man’s return trip take?

2. Earnest can do a job in 2 hours, Dave ca do the same job in 3 hours, and Noel can do the job in 6 hours. Working together ow long does it take them to finish the job?

3. Mr. Guevarra had Php 2,000,000.00 to invest. He invested part of it at 5% per year and the remainder at 4% per year. After one year, his investment grew to Php 2,095,000.00. How much of the original investment was invested at 5%?

4. A man walks down the road for half an hour at an avarage speed of 3 kph. He waits 10 minutes for the tricylcle, which brings him back to his starting point at 7:15. If the man began his walk at 6:25 the same morning, what was the average speed of the tricycle?

5. In a right triangle, sides a, b, c have values such as a > b > c. Which of the following expresses the value of b2?

6. If 6 workers can complete 9 identical jobs in 3 days, how long will it take 4 workers to complete 10 such jobs?

7. Pipe A fills a 50-liter tank at a rate of 15 liters per hour. Pipe B fills the same tank at a rate of 10 liters per hour. Pipe A runs alone for 100 minutes then the two of them together finish filling up the tank. How long does the whole operation take?

8. Type A sugar normally costs Php 75 per kilogram. It is mixed with Type B, which normally costs Php 80 per kilogram, to form a mixture that costs Php 78 kilogram. If there are 10 kilograms of mixture, how many kilograms of Type A were used?

9. A train went 300 km from Province A to Province B at an avarage rate of 180 kph. At what speed didi it travel on the way back if its avarage speed for the whole trip was 120 kph?

10. Maria spent exactly Php 250.00 on Php 3.00-, Php 6.00-, and Php 10.00- stamps. If she bought ten Php 3- stamps and twice as many Php 6 stamps as Php 10 stamps, how many Php 10 stamps did he buy?

11. Rommel has two quarts of a 21% acid...