Posted in A-Level, Exam Papers

Suggested Answers to 2013 A Level H2 Math 9740 Paper 2

 

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The above solutions had been worked out by Mr Teng.

Errata:

For qn 3(I) line 7, the denominator of the third derivative of f(x) should be of power 4 instead of 2.

For qn 4(I), was some scanning error. The answer is 40.4.

For qn11(III), I made a terrible mistake and forgot the third case for which exactly three letters same AND two digits same. The permutation for that will be (26×9).

11(iv) I made the mistake of double counting and arranged after using the permute function. The following is the full solutions

Case 1: Exactly one vowel and 2 different consonants and exactly one even digit

(5C1)(21C2)(3!)(4C1)(5C1)(2!) =252000

Case 2: Exactly one vowel and 2 same consonants and exactly one even digit

(5C1)(21C1)(3!/2!)(4C1)(5C1)(2!)=12600

P(exactly one vowel & exactly one even digit) = (252000+12600)/(26^3*9^2) = 0.186 (3SF)

Disclaimer: We welcome fair comments and discussion. The answers were rushed out and done while Mr Teng was in between classes too. So there are errors definitely, so many thanks for all who point them out. 🙂

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Posted in A-Level, Exam Papers

Suggested Answers to 2013 A Level H2 Math 9740 Paper 1 (11 Nov)

MOCK EXAMS FOR SCIENCE PRACTICAL

 

 

 

END OF PAPER

Note: The above answers had been hurriedly worked out by Mr Teng, our H2 Math tutor.

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Errata: question 7(iii)
This question is really confusing due to the word “before”. However, after much discussions, Mr Teng concludes that he is wrong. The answer should be n=12. If you put the emphasis on how many MUST be cut off, 12 will be the correct answer. If you’re my student, you will know that my English is terrible. Haha.

Question 6(iii)) should λ = 8μ/7.

Question 9(iii) due to the lousy app should be 24n.

Disclaimer: Question 3
The line y=1 was drawn as part of my solution to (ii). So long as the diagram is clearly labeled, there should be no issues.

Any more issues, please let me know. Lastly, big thank-you to all the j1 and j2s who helped me clarify and explain the English behind the statement. And do watch out this space for P2!

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(1) What to do if your A-level results are bad …

(2) A-Level Results: What to do if you get BAD or DEAD, i.e., the ‘middle class’

(3) Beware the critical years in math education …

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