Suggested answer for 2012 EM P2

EM P2 seems very standard. Very few distinction questions. Again, Distinction depends on number of careless mistakes! Whatever the case, whether you have done well or not, please move on and study for A Math and Science papers. From E Math paper, it seemed that questions are repeated so the secret in getting a distinction will depend on how well you know the TYS questions so that you can do 80% of questions which are standard questions and have more time to attempt the 20% distinction questions especially for A Math.

Suggest answers as below

1a) 3(x-4y)(x+4y)

1b) (5x+1)/15

1c) 2/(3xy^2)

1di) 36.7

1dii) a = [(3v/4(pi)) +b^3]^(1/3)

1e) -1.5

2ai) 120

2aii) 42

2b) 140

2c) 13.7

2d) 10.5

3ai) (8)

        -4

3aii) y = - 0.5x – 1.5

3bia) 0.75

3bib) -2

3bii) C (2, -0.5)

4ai) $420

4aii) 256 euro

4b) $275.70

4ci) 8.1356 x 10^13

4cii) 75500

5ai) 62, 28, 70

5aiia) 132

5aiib) 50

5b) 95.5

6aii) 3

6aiii) {3,5,6,7,9,10,11,12,13,14,15}

6bi) (125   50)

         100  150

6bii) (3)

          2.5

6bii) (500)

          675

6biv) total amt of fees paid by boys and girls in 5 weekdays respectively

6bv) $1234

7a) p = 7.47

7c) 2.3 or 3.4

7d) 1.71

7e) (2.85, -0.3)

8a) 2000/x

8b) 2000/(x+100)

8d) 61.8 or -161.8

8e) 12min 22s

9b) 162

9c) 9.38

9d) 130

9e) 1480

10aia) 37

10aib) 17

10aii) 46

10aiii) Students did better in Physics test as median (37) higher

            Students’ marks had a wider spread for chemistry test as its sd (22) was bigger.

10bia) 3/8

10bib) 7/16

10biia) 3/10

10biib) 11/24