# Where can I find Cambridge worked solutions? (1 Viewer)

#### chxx1234

##### New Member
Hi, does anyone know where I can find Cambridge worked solutions for maths extension 1 (both yr11 and 12)? Thanks!

#### tywebb

##### dangerman
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.

Year 11:

Year 12:

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

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#### tywebb

##### dangerman
Taking this a little further there is also a list for Ext. 2 for missing solutions:

Ext 2 Cambridge solutions are complete except for:

1F Q17
2F Q17, 18, 19, 20, 21
3C Q11d
3D Q10
3E Q3e
4A Q5e
6F Q7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
6G Q7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
6H Q1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29

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