BMST - Basic Math and Science Ratios, Proportions, and Percentages Questions and Answers

Question 1

A chemical solution contains acid and water in a ratio of 4:5. If the total volume of the solution is 72 liters, what is the volume of acid in the solution?

Accepted Answer

32 liters

Answer

40 liters

Answer

36 liters

Answer

45 liters

Question 2

A new machine can produce 150 widgets in 6 minutes. If the machine maintains this constant rate, how many widgets can it produce in one hour?

Accepted Answer

1500

Answer

900

Answer

1200

Answer

3000

Question 3

A laboratory sample initially weighed 120 grams. After a dehydration process, its weight was reduced to 96 grams. What was the percentage decrease in the weight of the sample?

Accepted Answer

20%

Answer

24%

Answer

25%

Answer

15%

Question 4

A technician is preparing a saline solution. Which of the following represents the highest concentration of salt?

Accepted Answer

10 grams of salt in 50 grams of water

Answer

15 grams of salt in 100 grams of water

Answer

25 grams of salt in 150 grams of water

Answer

5 grams of salt in 30 grams of water

Question 5

In a manufacturing plant, 60% of the employees are machine operators. Of the remaining employees, 25% are in maintenance. If there are 120 employees in maintenance, what is the total number of employees in the plant?

Accepted Answer

1000

Answer

800

Answer

1200

Answer

600

Question 6

The ratio of two numbers is 3:7. If 9 is added to each number, the new ratio becomes 12:23. What is the smaller of the original numbers?

Accepted Answer

10

Answer

15

Answer

25

Answer

8