They are in the Teacher's Suites. They are available to the teachers who may at their discretion make the solutions available to the students. They are however incomplete.

You can buy them yourself but are wasting your money if your school will make them available to students for free.

Anyway here are the links if you need to buy them:

Year 11:

Cambridge Education

www.cambridge.edu.au

Year 12:

Cambridge Education

www.cambridge.edu.au

I made a list of questions for which the solutions are missing. I haven't looked at this this for a while so maybe some of the following may have already been fixed by Cambridge.

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Year 11 Cambridge Extension 1 solutions complete except

1D Q8e, 8f, 9e, 9f, 10e, 10f

1G Q6g, 6h, 7

2C Q6j, 6k, 6l

Chapter 2 review exercise Q16, 17, 18, 19

3D Q4

3E Q16c

4C Q6c, 6d, 6f, 6g, 7a, 8e, 8f

6E Q19

Chapter 6 review exercise Q1, 9

7D Q14e, 14g

8F Q11, 12

8G Q12

9C Q1a, 1b

9D Q2, 10, 11, 21

9E Q4

9F Q1-5, 7, 10a, 10b, 10c, 11

9G Q1a, 2b, 2c, 3, 4, 7

9H Q6b, 6c, 10a, 11b, 11c, 14

9I Q2h, 16

9K Q9c

9L Q1, 2a, 2b, 2d, 5, 6, 7

Chapter 9 review exercise Q2a, 2b, 2f, 2g, 2h, 7a, 7b

11E Q1, 2, 3, 4a, 4b, 4c, 5, 11

11F Q8c

11G Q6

11H Q1, 3, 4, 6a, 6c, 12

11J Q1, 2b, 4b, 5b, 5c, 6, 7, 8d, 9a, 9c, 11, 12a, 13, 14, 15, 16

Chapter 11 Review exercise Q2a, 2c, 2d, 5, 6, 7, 8, 9a, 9b, 9c, 9d, 9e, 9f, 9g, 9h, 9i, 13, 15, 17, 18, 22a, 23, 30a, 30b

13A Q4a, 4c, 5a, 7a, 7d, 13a, 13b, 13c, 13d, 13f

13B Q1, 2, 3, 4, 5a, 10a, 10b, 10c, 10e, 10f, 10g, 12a, 12b, 13

13C Q1, 2, 4b, 6b, 6c, 8c, 10b, 10e, 13, 14

13D Q1, 2, 3, 4a, 4b, 5, 6, 7b, 8, 9, 10, 11, 12, 13, 14

Chapter 13 Review Exercise Q3, 5b, 9, 10, 12b

14E Q18c

15A Q17

Chapter 17 review exercise Q3a

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Some are incorrect:

3F Q10b

9C Q5

9F Q6

9I Q2a, 2c, 2d, 2e, 2f, 2g, 9

11H Q6b, 7a, 7b, 7e, 7f, 7g, 7h, 8, 9a

Chapter 11 Review exercise Q31

13C Q12a

13D Q4c, 7a

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Year 12 Ext 1 Cambridge solutions are complete except for:

1A Q21

1I Q9, 10

3G Q8e

3H Q10e, 11e

4B Q18, 19 (note solution numbered 18 is actually the solution to question 20)

5A Q12

5H Q17

6I Q4b

7D Q5

9B Q14bii

9C Q13e, 13f, 17b

Chapter 9 review exercise Q11d

11B Q5e, 5f

12A Q22b

12B Q1

Chapter 12 review exercise Q20b, 20c

13A Q2c

13C Q19biv

13D Q19e

14D Q16

15F Q5, 6, 7, 8a, 8b, 8h, 9, 10, 11a, 11b, 11c, 11f, 11g, 11h, 11i, 11j, 12

16A Q12bii (note that solution number ii is actually for iii)

16B Q12giii, 12giv, 16c (note solution numbered 16c is actually for 16d), 17d, 17e, 17f

16D Q11, 19c

16G Q1e, 2, 3, 4a, 4b, 4d, 4e, 4f, 4g, 4h, 5, 6, 7, 8a, 8b, 8c, 8e, 8f, 8g, 8h, 8i, 9

17B Q7a, 7b, 7c, 7d, 7i, 7j

17C Q10a, 11

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Some are incorrect:

1A Q17h

3D Q16b, 16d, 16e

5H Q16 - only answer given, not complete solution

7B Q15

12A Q22a

12E Q3a

13A Q1c, 3c