BMST - Basic Math and Science Ratios, Proportions, and Percentages Questions and Answers 3

Question 1

A solution is 15% salt by weight. If you have 200 grams of the solution, how many grams of salt does it contain?

Accepted Answer

30 grams

Answer

15% of 200 = 0.15 × 200 = 30 grams of salt.

Question 2

A car travels 180 miles using 6 gallons of gas. At this rate, how many gallons are needed for a 270-mile trip?

Accepted Answer

9 gallons

Answer

Set up the proportion 180/6 = 270/x, giving x = 270 × 6 / 180 = 9 gallons.

Question 3

The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many students are in the class total?

Accepted Answer

64

Answer

If 3 parts = 24, then 1 part = 8; total parts = 3 + 5 = 8, so total students = 8 × 8 = 64.

Question 4

An item originally priced at $80 is marked down by 35%. What is the sale price?

Accepted Answer

$52.00

Answer

Discount = 35% × $80 = $28; sale price = $80 − $28 = $52.00.

Question 5

If 5 workers can complete a task in 12 days, how many days would it take 10 workers to complete the same task?

Accepted Answer

6 days

Answer

This is inverse proportion: 5 × 12 = 10 × d, so d = 60 / 10 = 6 days.

BMST - Basic Math and Science Test Practice Test