Error Intervals – Foundation – GCSE Questions These questions are the same format as previous GCSE exams. COPY means they use the exact same numbers as the original GCSE question. Otherwise, they are clone questions using different numbers. The worksheets are provided in a variety of sizes.

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GCSE GCSE GCSE GCSE Edexcel Foundation: June 2017 Paper 2, Q23 A number, x, is rounded to 2 decimal places. The result is 3.58. Using inequalities, write down the error interval for x. 1 A number, x, is rounded to 2 decimal places. The result is 3.58. Using inequalities, write down the error interval for x. (Total for Question 1 is 2 marks) (Total for Question 1 is 2 marks) 2 A number, q, is rounded to 2 decimal places. The result is 5.63. Using inequalities, write down the error interval for q. 2 A number, q, is rounded to 2 decimal places. The result is 5.63. Using inequalities, write down the error interval for q. (Total for Question 2 is 2 marks) (Total for Question 2 is 2 marks) GCSE GCSE Edexcel Foundation: June 2017 Paper 2, Q23 Edexcel Foundation: June 2017 Paper 2, Q23 1 A number, x, is rounded to 2 decimal places. The result is 3.58. Using inequalities, write down the error interval for x. 1 A number, x, is rounded to 2 decimal places. The result is 3.58. Using inequalities, write down the error interval for x. (Total for Question 1 is 2 marks) (Total for Question 1 is 2 marks) 2 A number, q, is rounded to 2 decimal places. The result is 5.63. Using inequalities, write down the error interval for q. 2 A number, q, is rounded to 2 decimal places. The result is 5.63. Using inequalities, write down the error interval for q. (Total for Question 2 is 2 marks) (Total for Question 2 is 2 marks)

GCSE GCSE GCSE GCSE Edexcel Foundation: June 2017 Paper 3, Q23 Anne’s house has a value of £220,000 correct to 2 significant figures. (a) (i) Write down the least possible value of the house. 1 Anne’s house has a value of £220,000 correct to 2 significant figures. (a) (i) Write down the least possible value of the house. £ £ (1) (1) (ii) Write down the greatest possible value of the house. (ii) Write down the greatest possible value of the house. £ £ (1) (1) The value of David’s house increases by 5%. His house then had a value of £315,000 (b) Work out the value of David’s house before the increase. The value of David’s house increases by 5%. His house then had a value of £315,000 (b) Work out the value of David’s house before the increase. £ £ (2) (2) (Total for Question 1 is 4 marks) (Total for Question 1 is 4 marks) GCSE GCSE Edexcel Foundation: June 2017 Paper 3, Q23 Edexcel Foundation: June 2017 Paper 3, Q23 1 Anne’s house has a value of £220,000 correct to 2 significant figures. (a) (i) Write down the least possible value of the house. 1 Anne’s house has a value of £220,000 correct to 2 significant figures. (a) (i) Write down the least possible value of the house. £ £ (1) (1) (ii) Write down the greatest possible value of the house. (ii) Write down the greatest possible value of the house. £ £ (1) (1) The value of David’s house increases by 5%. His house then had a value of £315,000 (b) Work out the value of David’s house before the increase. The value of David’s house increases by 5%. His house then had a value of £315,000 (b) Work out the value of David’s house before the increase. £ £ (2) (2) (Total for Question 1 is 4 marks) (Total for Question 1 is 4 marks)

GCSE GCSE GCSE GCSE Edexcel Foundation: November 2017 Paper 3, Q23 Find the value of the reciprocal of 1.6 Give your answer as a decimal. 1 Find the value of the reciprocal of 1.6 Give your answer as a decimal. (1) (1) Jonah rounds a number, y, to one decimal place. The result is 9.8 (b) Write down the error interval for y. Jonah rounds a number, y, to one decimal place. The result is 9.8 (b) Write down the error interval for y. (2) (2) (Total for Question 1 is 3 marks) (Total for Question 1 is 3 marks) GCSE GCSE Edexcel Foundation: November 2017 Paper 3, Q23 Edexcel Foundation: November 2017 Paper 3, Q23 1 Find the value of the reciprocal of 1.6 Give your answer as a decimal. 1 Find the value of the reciprocal of 1.6 Give your answer as a decimal. (1) (1) Jonah rounds a number, y, to one decimal place. The result is 9.8 (b) Write down the error interval for y. Jonah rounds a number, y, to one decimal place. The result is 9.8 (b) Write down the error interval for y. (2) (2) (Total for Question 1 is 3 marks) (Total for Question 1 is 3 marks)

GCSE Edexcel Foundation: June 2017 Paper 3, Q23 Anne’s house has a value of £220,000 correct to 2 significant figures. (a) (i) Write down the least possible value of the house. £ (1) (ii) Write down the greatest possible value of the house. £ (1) The value of David’s house increases by 5%. His house then had a value of £315,000 (b) Work out the value of David’s house before the increase. £ (2) (Total for Question 1 is 4 marks)

GCSE Edexcel Foundation: June 2017 Paper 2, Q23 1 A number, x, is rounded to 2 decimal places. The result is 3.58. Using inequalities, write down the error interval for x. 3.575 – 3.58 – 3.585 3.575 ≤ x < 3.585 (Total for Question 1 is 2 marks) 2 A number, q, is rounded to 2 decimal places. The result is 5.63. Using inequalities, write down the error interval for q. 5.625 – 5.63 – 5.635 5.625 ≤ q < 5.635 (Total for Question 2 is 2 marks)

GCSE Edexcel Foundation: June 2017 Paper 3, Q23 1 Anne’s house has a value of £220,000 correct to 2 significant figures. (a) (i) Write down the least possible value of the house. 215,000 £ (1) (ii) Write down the greatest possible value of the house. 224,999.99 £ (1) The value of David’s house increases by 5%. His house then had a value of £315,000 (b) Work out the value of David’s house before the increase. 100% 5% 105% = 315,000 ÷ 105 300,000 1% = 3000 £ × 100 (2) 100% = 300,000 (Total for Question 1 is 4 marks)

GCSE Edexcel Foundation: November 2017 Paper 3, Q23 1 Find the value of the reciprocal of 1.6 Give your answer as a decimal. 1 1.4 =0.625 0.625 (1) Jonah rounds a number, y, to one decimal place. The result is 9.8 (b) Write down the error interval for y. 9.75 - 9.8 – 9.85 9.75 ≤ 9.8 < 9.85 (2) (Total for Question 1 is 3 marks)

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