P1 for working with overtime, eg 12 ÷ 4(=3) or 1.25 × (=2.5) or 0.25 × (=0.5) or 1.25 × “2” “2” 12(=15) P1 for a complete process, eg (10 8) × overtime rate + 12 × 8 12 × 10 + × 12 or – “0.5” A1 cao 10 M1 for 12 : (20 × 6) oe or 10 : 1 or 1 with 10 in incorrect notation 1 : 10 A1 cao Paper: 1MA1/1F Question Working Answer Mark Notes 11 (a) 36 M1 demonstrates the start of a method that could lead to the answer, eg recognition of square numbers, or use of differences, or diagrams A1 cao (b) 80 M1 demonstrates the start of a method that could lead to the answer, eg repeated addition of 4, or 20 × 4 A1 cao (c) C2 conclusion with supportive evidence, eg odd × odd = odd, or all odd numbers squared will be odd. (e.g. starts to work with (generate) square numbers for odd patterns or (2n + 1)2 (C1) eg 1 × 1 = 1, or generates sequence for squares using differences) 12 M1 for where a but < 17 or where b≠17 but > 7 ≠7 A1 oe 13 (a) B1 in the range 1.5 to 2 1.5 to 2 (b) M1 for scale factor in the range 5 to 6 7.5 to 12 A1 (ft) or for answer in the range 7.5 to 12
P1 P1 A1 for working with overtime, eg 12 ÷ 4(=3) or 1.25 × “2” (=2.5) or 0.25 × “2” (=0.5) or 1.25 × 12(=15) for a complete process, eg (10 – 8) × overtime rate + 12 × 8 or 12 × 10 + “0.5” × 12 cao 10 1 : 10 M1 A1 for 12 : (20 × 6) oe or 10 : 1 or 1 with 10 in incorrect notation cao Paper: 1MA1/1F Question Working Answer Mark Notes 11 (a) 36 M1 demonstrates the start of a method that could lead to the answer, eg recognition of square numbers, or use of differences, or diagrams A1 cao (b) 80 M1 demonstrates the start of a method that could lead to the answer, eg repeated addition of 4, or 20 × 4 A1 cao (c) C2 (C1) conclusion with supportive evidence, eg odd × odd = odd, or all odd numbers squared will be odd. (e.g. starts to work with (generate) square numbers for odd patterns or (2n + 1)2 eg 1 × 1 = 1, or generates sequence for squares using differences) 12 M1 for where a ≠7 but < 17 or where b≠17 but > 7 A1 oe 13 (a) 1.5 to 2 B1 in the range 1.5 to 2 (b) 7.5 to 12 M1 for scale factor in the range 5 to 6 A1 (ft) or for answer in the range 7.5 to 12
1ma1_1f_-_may_2017_mark_scheme.docx