Pearson Edexcel International GCSE.. Mathematics B PAPER 2. Graded A+

Answer all TWELVE questions. Write your answers in the spaces provided. You must write down all the stages in your working. 1 (a) Write 248000000 in standard form. (1) (b) Write 2.56×10–4 as an ordinary number. (1) ...

Answer all TWELVE questions. Write your answers in the spaces provided. You must write down all the stages in your working. 1 (a) Write 248000000 in standard form. (1) (b) Write 2.56×10–4 as an ordinary number. (1) (c) Calculate, giving your answer in standard form 2 5 10 1 3 10 1 5 10 60 59 48 . . . × − × × − (3) .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. (Total for Question 1 is 5 marks) https://britishstudentroom-b430a.web.app/*P68818A0332* Turn over 3 2 The ages, in years, of 7 friends are 9 8 7 6 10 a 7 The mean age of the 7 friends is 8 years. (a) Work out the value of a (2) (b) Find the median age of the 7 friends. (2) There are 34 passengers on a bus. The mean age of these passengers is 49 years. 11 of these passengers are pensioners. The mean age of these pensioners is 72 years. (c) Calculate the mean age, in years, of the passengers on the bus who are not pensioners. (3) .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. (Total for Question 2 is 7 marks) https://britishstudentroom-b430a.web.app/4 *P68818A0432* 3 Triangles A and D are drawn on the grid below. Triangle B is the image of triangle A under a reflection in the line with equation y = –x (a) On the grid below, draw and label triangle B. (2) Triangle A is transformed to triangle C under the translation − −   9 2 (b) On the grid, draw and label triangle C. (2) (c) Describe fully the single transformation that maps triangle A onto triangle D.