Pearson Edexcel International GCSE (9–1) · MATHEMATICS A · Unit
Unit 3
104 practice questions
Topics covered
Practice questions
1–10 of 47 · Normal
Question 1
2 marks · Normal
Answer and see the solution →Write down all the factors of 36.
Question 2
3 marks · Normal
Answer and see the solution →Express 84 as a product of its prime factors. Give your answer in index form.
Question 3
2 marks · Normal
Answer and see the solution →Explain why 13 is a prime number, but 15 is not.
Question 4
4 marks · Normal
Answer and see the solution →For the number 48:
(a)[2 marks]Write down all the factors of 48.
(b)[2 marks]List the first four multiples of 48.
Question 5
2 marks · Normal
Answer and see the solution →Is 1 a prime number? Explain your answer.
Question 6
3 marks · Normal
Answer and see the solution →A school has 96 red pens and 120 blue pens. Each box packed must have the same number of red pens and the same number of blue pens, with none left over. What is the greatest number of boxes that can be packed?
Question 7
4 marks · Normal
Answer and see the solution →Express 150 as a product of its prime factors. Use your answer to find the highest common factor (HCF) of 150 and 180.
Question 8
2 marks · Normal
Answer and see the solution →A student says, 'All even numbers greater than 2 are composite.' Is this statement true? Explain why.
Question 9
4 marks · Normal
Answer and see the solution →Expand and then fully factorise the following expression:
(a)[2 marks](b)[2 marks]Now, factorise completely:
Question 10
2 marks · Normal
Answer and see the solution →Write down an algebraic identity involving squares and simplify it to show it is always true.