Pearson Edexcel International GCSE (9–1) · MATHEMATICS A · Unit
Unit 2
105 practice questions
Topics covered
Practice questions
21–30 of 105
Question 21
1 mark · Easy
Answer and see the solution →Evaluate \( \sqrt{64} \ ).
Question 22
3 marks · Easy
Answer and see the solution →The formula for the perimeter of a rectangle is .
(a)[2 marks]Substitute and into the formula. Work out the value of .
(b)[1 mark]If and , rearrange the formula to find the value of .
Question 23
1 mark · Easy
Answer and see the solution →Write the following using index notation:
Question 24
1 mark · Easy
Answer and see the solution →Evaluate \( 4^0 \ ).
Question 25
2 marks · Normal
Answer and see the solution →Use the rules of indices to simplify the following expression and give your answer as a single power of :
Question 26
3 marks · Normal
Answer and see the solution →Simplify the following algebraic fraction as much as possible:
Question 27
4 marks · Normal
Answer and see the solution →A formula links the area of a rectangle to its length and width :
(a)[1 mark]Substitute and . Work out the area .
(b)[2 marks]Rearrange the formula to make the subject.
(c)[1 mark]If the area and , find .
Question 28
3 marks · Normal
Answer and see the solution →Complete the table for where is directly proportional to .
n 1 2 4 m 5 Question 29
2 marks · Normal
Answer and see the solution →Evaluate .
Question 30
4 marks · Normal
Answer and see the solution →Given that is inversely proportional to .
(a)[2 marks]If when , write a formula for in terms of .
(b)[1 mark]Calculate the value of when .
(c)[1 mark]Find the value of when .