Maths Edexcel Paper 3 unofficial markscheme

a lot of these seem wrong imo matches was 480......

the cos(angle) was an increase because it went from 7/11 to 7/10

the matches was 16x15 = 240

Unofficial Markscheme: June 12 2018 3H Edexcel Maths




1a) Negative [1 mark]

1b) Anomalous – doesn’t fit trend [1 mark]

1c) Extrapolation – outside data range so unreliable [1 mark]

2) 9p + 13 [2 marks]

3) Triangle drawn with area 18 [2 marks]

4) Shouldn’t be 0.25 on first throw, should be 0.35.

On the second row they were the wrong way around [2 marks]

5a) 50.5 deg [2 marks]

5a) cos x increased as 7/10 is greater than 7/11 [1 mark]

6a) 8 counters[4 marks]

6b) Divisible by 2 [1 mark]

7) 3.8? [? marks]

8) £150,000 [5 marks]

9a) Gradient is 3/2 [3 marks]

9b) Shows the rate of change of volume with respect to time

[1 mark]

9c) Starts at 4 litres full [1 mark]

10) Flashes 10 times an hr [5 marks]

11) 140 deg [5 marks]

12a) 4.52 . 10³[2 marks]

12b) Lottie’s is wrong as denominator also increased

[2 marks]

13) 240 matches [2 marks]

14) 6.50 cm³ [5 marks]

15a) 42[3 marks]

15b) U_n = n² – n [2 marks]

16a) 497.5m[3 marks]

16b) Underestimate+reasons

[1 mark]

17) 5/3 [5 marks]

18a) Shown solution between 1 and 2 [2 marks]

18b) Rearranged [1 mark]

18c) 1.74… [4 marks]

19) 13.1cm[5 marks]

20) 3/245[5 marks]

21a+b) Proof [4+2]

wasn’t the matches question 480 because they play each team twice??

For the last question I said it was congruent by RHL. I think it's the same as RHS but will I lose marks?