Number Operations & Integers (Edexcel IGCSE Maths): Exam Questions

$A=2\times2\times2\times3\times3\times5$

$B=2\times2\times3\times3\times3\times5$

Find the lowest common multiple (LCM) of $5A$ and $7B$ Show your working clearly.

The table shows the lowest temperature for the month in each of six months for Winnipeg in Canada.

Which of these six months has the lowest temperature?

Work out the difference between the lowest temperature in August and the lowest temperature in November.

The lowest temperature in March was 23°C lower than the lowest temperature in August.

Work out the lowest temperature in March.

Rolando bought

• a magazine for 3.20 euros
• a bunch of flowers for 4.25 euros
• and 2 bars of chocolate.

Rolando paid with a 20 euro note. He received 7.25 euros change.

The cost of each bar of chocolate was the same.

Work out the cost of 1 bar of chocolate.

Finn is asked to find the value of $5+3^{2}+12$

Here is his working and his answer

$\begin{gathered} 5 + 3^{2} + 12 & = 8^{2} + 12 \\ = 64 + 12 \\ = 76 \end{gathered}$

Finn’s answer is wrong.

Explain what Finn has done wrong in his working.

Write one pair of brackets in this calculation so that the answer is correct.

$2\times6--4^{2}--14=10$

Here are some facts about JFK International Airport.

Write down the value of the 2 in the number 4725

It is further from JFK International Airport to California than it is to Texas.

How much further?

Akbar goes to a restaurant with his friends. They have a total of 1000 dirhams to spend on food.

They order

• 2 dishes of chicken makhani at 145.50 dirhams each
• 3 dishes of vegetable korma at 110 dirhams each
• some naans at 30 dirhams each

They order as many naans as they can

They pay with a 1000 dirham note.

Work out how much change they should receive.

Melanie finds this information about the number of people, in millions, who speak each of five languages as their first language.

Which of these languages is the first language of the greatest number of people?

More people speak Japanese as their first language than speak Greek as their first language.

How many more?

million

The number of people who speak Tamil as their first language is $\frac{1}{4}$ of the number of people who speak Bengali as their first language.

Work out the number of people who speak Bengali as their first language.

million

It is estimated that 861 700 people can speak Welsh.

Write 861 700 in words.

Write in figures the number seven thousand and fifty four.

Write down the value of the 7 in the number 673000

Write a number in the box to make the calculation correct.

$9 \times \text{square} = 18000$

Write a number in the box to make the calculation correct.

$53.7 \div \text{square} = 0.005 37$

Adriana makes some cupcakes.

She sells each cupcake for £2.20

Mike buys 6 of these cupcakes. He pays with a £20 note.

Work out how much change Mike should receive.

Greta sells balloons

She sells each balloon for £0.85

Stefan has £50 to spend on balloons.

Work out the greatest number of balloons he can buy.

Here are the temperatures, in °C, in Paris at midnight for one week.

−3 −7 −2 −6 −9 −1 −5

Write down the lowest temperature.

There are four teams in a cricket competition.

The teams are

Each team will play every other team once.

Write down all the matches that will take place.

The table gives information about the weight of sugar produced by each of five countries in one year.

Write the number 28 149 in words.

Which of these five countries produced the greatest weight of sugar?

Write down the value of the 8 in the number 23 787

From the numbers in the box, write down the multiple of 5.

From the numbers in the box, write down the factor of 30.

From the numbers in the box, write down the square number

From the numbers in the box, write down the prime number

Here is a list of numbers.

9 11 13 15 21 60

From the numbers in the list, write down the even number.

From the numbers in the list, write down the square number

From the numbers in the list, write down the multiple of 7

From the numbers in the list, write down the factor of 30

Here is a list of numbers.

9 11 25 27 33 40

From the numbers in the list, write down

(i) an even number

(ii) a cube number

Hassan says,

“the sum of two prime numbers is always even”

Give an example to show that Hassan is not correct.