32 2.5 × 103 = 2500 Too small M1 2 M1 for using trial and improvement H = 4 n 2.5 × 104 = 25 000 A1 A1 for correct answer 2.5 × 105 = 250 000 Too big 2 33 a 0.6 B1 2 cao H b 0.9 B1 cao 1.3 B1 cao c d 0.3 B1 cao e 0.1 B1 cao f 1.2 B1 cao g 1.5 B1 cao h 1.4 B1 cao i 2.1 B1 cao j 3.5 B1 cao 10 34 Statement is false. M1 2 M1 for finding an example which disproves the H Try = 3, = 4 a b statement A1 A1 for stating it is false = = = 5 C1 C1 for clear communication of the solution + = 7 a b 3 35 For example: 2÷ B1 2 B1 for a correct division of two surds H = The cancels from numerator and P1 P1 for showing how the surds will leave an integer denominator leaving 2, an integer. answer C1 C1 for clear communicating of method used 3 36 a For example: 3 + and 3 B1 2 B1 for a correct possible pair of surds H – For example: and b B1 B1 for a correct possible pair of surds 2
32 2.5 × 103 = 2500 Too small 2.5 × 104 = 25 000 2.5 × 105 = 250 000 Too big n = 4 M1 A1 2 M1 for using trial and improvement A1 for correct answer H 2 33 a b c d e f g h i j 0.6 0.9 1.3 0.3 0.1 1.2 1.5 1.4 2.1 3.5 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 2 cao cao cao cao cao cao cao cao cao cao H 10 34 Try a = 3, b = 4 = = = 5 a + b = 7 Statement is false. M1 A1 C1 2 M1 for finding an example which disproves the statement A1 for stating it is false C1 for clear communication of the solution H 3 35 For example: 2÷ = The cancels from numerator and denominator leaving 2, an integer. B1 P1 C1 2 B1 for a correct division of two surds P1 for showing how the surds will leave an integer answer C1 for clear communicating of method used H 3 36 a b For example: 3 + and 3 – For example: and B1 B1 2 B1 for a correct possible pair of surds B1 for a correct possible pair of surds H 2
Higher_Skills_Number_MarkScheme_Edexcel.docx