Edexcel Gcse Mathematics Linear 1380 Answers

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

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

$2 \times 11^2 + 2$

(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) (3 marks)

b) (2 marks)

c) (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) (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) (2 marks)

b) -3 and 0.5 (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!

Mr M, can you upload the paper?

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

It's copyright. Answers aren't.

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

(Original post by 123_456_789)
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.

(Original post by 123_456_789)
Do you think this paper was harder than the June 2011 one?

It is.

(Original post by Mr M)
About the same - the probability tree diagram and angles in a circle questions were hard and others were challenging.

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

(Original post by zoologist7)
Absolutely brilliant! means I probably got around 45-60 marks from what I can remember. But that was an evil paper.

OMG! i know right. it was nothing like the past papers. it was really hard

(Original post by 123_456_789)
Ah, OK. I'll take that as a prediction of the grade boundaries then. :teehee:

You probably can.

i got like 42, is that bad?

What topics do you think are likely to come up in the calculator paper on monday?

You see question 16, would they accept 6000 kg, i think my working out was correct but forgot to convert it.
And question 6, i wrote 14:12 pm, would they accept that?

(Original post by Mr M)
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

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

$2 \times 11^2 + 2$

(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) (3 marks)

b) (2 marks)

c) (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) (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) (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 got k=3 for the surds Q
oops I see my mistake

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?

Exactly, what a shocker !
It was terrible!
Oh well, I guess the grade boundaries would be low then :')

(Original post by QPRboy)
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?

For 11b) I wrote that too ! I hope it's okay.

for the tree diagrams question would you still get the mark if you haven't canceled the fractions down?