and 6 => 35 and not prime –5 and 9 => 77 and not prime –8 accept any indication of "not prime" B1 any correctly evaluated with no conclusion Examples 3 and 4 => 17 – and 5 => 25 –4 and 6 => 35 –5 and 7 => 47 –6 and 8 => 61 –7 and 9 => 77 –8 or incorrectly evaluated that gives a counter example with non-prime conclusion B2 [2] M53. Extra volume = 50 × 34 × 4.5 = 7650 M1 1912.5 A1
–5 and 6 => 35 and not prime –8 and 9 => 77 and not prime accept any indication of "not prime" B1 any correctly evaluated with no conclusion Examples – 3 and 4 => 17 –4 and 5 => 25 –5 and 6 => 35 –6 and 7 => 47 –7 and 8 => 61 –8 and 9 => 77 or incorrectly evaluated that gives a counter example with non-prime conclusion B2 [2] M53. Extra volume = 50 × 34 × 4.5 = 7650 M1 1912.5 A1
AllUnit3QnsandmarkschemeWordversion.docx