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Mathematics (Mth51Us/Mff40Us) Practice Exercise

The document contains a series of mathematics practice exercises covering various topics, including arithmetic operations, percentages, ratios, and problem-solving scenarios. It includes multiple questions that require calculations related to price changes, population statistics, and ratios of items. Additionally, it presents real-world applications of mathematical concepts, such as revenue increases and workforce ratios.

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13 views2 pages

Mathematics (Mth51Us/Mff40Us) Practice Exercise

The document contains a series of mathematics practice exercises covering various topics, including arithmetic operations, percentages, ratios, and problem-solving scenarios. It includes multiple questions that require calculations related to price changes, population statistics, and ratios of items. Additionally, it presents real-world applications of mathematical concepts, such as revenue increases and workforce ratios.

Uploaded by

negumbo3526200
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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MATHEMATICS (MTH51US/MFF40US)

Practice Exercise

Question 1
a) 6 − 2 × (3 + 2) + 8 ÷ 4
b) 32 − (2 × 4) + 5
c) (6 + 2) × [5 − (3 + 1)
d) 4 × (2 + 32 ) ÷ (6 − 3)

Question 2

1 2 1
a) 1 2 × 2 3 − (4 + 1 3)
2 1
b) 2 ÷ 1 × (5 ÷ 3)
3 2
2 5 7 1
c) (3 + 6) ÷ (8 − 4)

Question 3

a) If the price of a product increases from N$150 to N$180, what is the percentage
increase?
b) A car’s value decreases from N$20,000 to N$15,500. What is the percentage
decrease?
c) The population of a town increased from 12,000 to 13,800. Calculate the percentage
increase.

Question 4

a. If 35% of a class of 200 students are girls, how many girls are there in the class?
b. A company’s profit increased by 18% from the previous year’s profit of N$75,000. What
is the current year’s profit
c. The population of a city decreased by 10% and is now 45,000. What was the original
population?
d. In a survey, 62% of respondents preferred brand A over brand B. If 310 people
preferred brand A, how many people were surveyed in total?
e. A restaurant's revenue increased by 12% from $45,000 to $50,400. What was the initial
revenue before the increase?

Question 5

a) If the ratio of apples to oranges in a basket is 3:4, and there are 24 oranges, how many
apples are there?
b) The ratio of apples to oranges in a basket is 4:5. If there are 20 apples, how many
oranges are there?
c) A company has a workforce ratio of 3 men to 4 women. If there are 28 women, how
many men are there?
d) A sum of N$2400 is divided among three friends in the ratio 5:3:2. How much does
each person get?

Question 6

a) A recipe requires 3 cups of flour to make 12 cookies. How many cups of flour are
needed to make 30 cookies?
b) If 8 workers can complete a task in 15 days, how long will it take 12 workers to complete
the same task, assuming they work at the same rate?
c) A car travels 240 miles in 4 hours at a constant speed. How long will it take to travel
450 miles at the same speed?
d) If 5 machines can produce 200 widgets in 8 hours, how many machines are needed to
produce 500 widgets in the same time?

Question 7

a) In a test, John answered 24 out of 30 questions correctly, In Test B he answered 20


out of 24 questions correctly. On which test did he have better result?
b) Order the following values in ascending order:
8 5
0.2; 90%, 9 ; 42%; 8

c) 40% of the contestants in a competition are eliminated in round one. In round two, 50%
of the remaining contestants are eliminated. If 140 people started the competition, how
many go into round three?

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