Mathematics > GCSE MARK SCHEME > Mark Scheme (Provisional) Summer 2021 Pearson Edexcel International GCSE Mathematics A (4MA1) Paper (All)
Please note: [height =] 8 + 0.5 × 6 (=11)[metres] means we do not need to see ‘height =’ or ‘metres’ and if we see 8 + 0.5 × 6 we can award the method mark – and we can award the method ... mark if we see 11 without the working. In the mark scheme, if we see a number written “82.5”(or "82.5") in speech marks it means the number can be a followed through value, gained from correct working but with an inaccurate result from this working. It does not mean that the student can use any value. If a student can use any previous value that has been stated, it will be made clear in the mark scheme. When a certain degree of accuracy is requested in the question, students will normally be given the mark if they give this accuracy or better eg Q6 asks for one decimal place which gives 10.4 The mark scheme says accept 10.4 – 10.42 Therefore full marks can be awarded for an unrounded answer such as 10.416 If in the working we saw 10.4 or 10.416 and then 10 on the answer line, we could award full marks. If we did not see an answer in the range 10.4 – 10.42 and the answer of 10 was given then the student would not be able to gain the accuracy mark – as long as correct working was shown the response could be awarded the method marks. An answer of 10 (with no 10.4 – 10.42) with no working or incorrect working would gain no marks. In most cases rounding instructions are for guidance only and we will accept the figure or better (more figures than specified). If we are insistent on certain rounding, this will be clearly stated in the mark scheme. http://britishstudentroom.wordpress.com/International GCSE Maths Apart from questions 1, 2, 4b, 5, 8, 12d, 19, 21, 23 (where the mark scheme states otherwise) the correct answer, unless clearly obtained from an incorrect method, should be taken to imply a correct method. Question Working Answer Mark Notes 1 eg 2 × 2 × 150 or 3 × 5 × 40 or 2 × 3 × 100 or 5² × 24 or or 2 600 2 300 150 3 M1 for at least 2 correct stages in prime factorisation which give 2 prime factors – may be in a factor tree or a table or listed eg 2, 2, 150 (see LHS for examples of the amount of work needed for the award of this mark, allow no more than one mistake ft (eg one mistake with 2 prime factors ft: 600 = 200 × 30 = 2 × 100 × 5 × 6)) eg 2 × 2 × 2 × 3 × 5 × 5 oe 2 600 2 300 2 150 3 75 5 25 5 5 [1] M1 for 2, 2, 2, 3, 5, 5 (ignore 1s) (may be a fully correct factor tree or ladder) Working required and note that the answer must be given as a product of powers of prime factors 23 × 3 × 52 A1 dep on M2 can be any order (allow 23 . 3 . 52) [Show More]
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