Mr M’s Edexcel GCSE Linear 1380 Higher Tier Non Calculator Paper 3 Answers Nov 2011

Mr M, can you upload the paper?

Do you think this paper was harder than the June 2011 one?

Do you think this paper was harder than the June 2011 one?

About the same - the probability tree diagram and angles in a circle questions were hard and others were challenging.

Absolutely brilliant! means I probably got around 45-60 marks from what I can remember. But that was an evil paper.

Ah, OK. I'll take that as a prediction of the grade boundaries then.

Mr M’s Edexcel GCSE Linear 1380 Higher Tier Non Calculator Paper 3 Answers November 2011


1. Theo’s earnings

a) $\frac{1}{5}$ (2 marks)

b) 30% (2 marks)

c) £5.75 (2 marks)


2. Number pattern

a) $4^2 + 6^2$

$2 \times 5^2 + 2$ (1 mark)

b) $10^2 + 12^2$

$2 \times 11^2 + 2$

$244$ (2 marks)

c) 2000002 (2 marks)


3. Exterior angles

150 degrees (4 marks)


4. Stem and leaf diagram

3.1 cm (2 marks)


5. Transformations

a) Translate shape correctly (2 marks)

b) Reflect shape correctly (2 marks)


6. Distances table

2 p.m. (4 marks)


7. Algebra

a) $t = 6$ (3 marks)

b) $4y-x$ (2 marks)

c) $x^2+2x-35$ (2 marks)


8. Estimate

0.09 (2 marks)


9. Suit prices

£9 (3 marks)


10. Angles

42 degrees (3 marks)


11. Scatter graph

a) Plot two points (1 mark)

b) As the temperature increases, the melting time decreases (1 mark)

c) 19 minutes (approx) (2 marks)

d) The line of best fit suggests the time will be negative OR the graph may be non-linear OR it is not a good idea to extrapolate (1 mark)


12. Simultaneous equations

x = 24 and y = 32 (4 marks)


13. Standard form

a) $2.4 \times 10^{16}$ (2 marks)

b) $6.4 \times 10^8$ (2 marks)


14. Solving quadratics graphically

a) i) 5.5 and -0.5

ii) 6.4 and -1.4 (3 marks)

b) x = 0.2, y = -3.8 and x = 5.8, y = 1.8 (3 marks)


15. Cumulative frequency

a) $200 < C \leq 400$ (1 mark)

b) 7, 18, 27, 37, 45, 50 (1 mark)

c) Draw graph (2 marks)

d) 18 (2 marks)


16. Mass of a prism

6 kg (5 marks)


17. Formulas

a) $-160$ (2 marks)

b) $x = \pm \sqrt{\frac{p-y}{2q}}$ (3 marks)

This will be marked correct even if you omitted the $\pm$ sign.


18. Indices

a) 1 (1 mark)

b) -2 (1 mark)

c) $\frac{1}{27}$ (2 marks)


19. Angles in a circle

ACB = 90 degrees (angle in a semicircle)

ACD = CDB (alternate angles)

CDB = DCB (isosceles triangle)

45 degrees (4 marks)


20. Factorising

a) $(2x-1)(x-4)$ (2 marks)

b) -3 (4 marks)


21. Surds

k =6 (5 marks)


22. Tree diagram

a) From A to B $\frac{3}{5}$ and $\frac{2}{5}$

From B to A $\frac{8}{11}$ and $\frac{3}{11}$ and $\frac{7}{11}$ and $\frac{4}{11}$ (2 marks)

b) $\frac{32}{55}$ (4 marks)


I am not going to guess grade boundaries so please don’t ask!

I flopped that paper now from the answers I remember
Have to do good in the calculator!

for 11(b) would negative correlation be ok?

I think I got around 45.