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# OCR (not MEI) C2 - Wednesday 20th May 2015 watch

1. second log one
2. does anyone know what the second part of the log question was the question
3. (Original post by SAMBAN)
does anyone know what the log question was
Log2(X) + Log2 (Y) = 8
Log2 (X^2/Y) = 7

something like that
5. (Original post by Rubberduckiller)
what exactly was the question
2n-3 = 18000
6. (Original post by Patsella)
Can someone write out how the 2n question works ?? So confused !!!!
Calculation of N ; C2 2015 q.pdf
7. I can't even remember what was in the exam now...
8. (Original post by Nuvertion)
It's better to compare this to June 2014. I reckon the grade/UMS boundaries will be pretty similar.
What was the mark for 100% in june 14?
9. what were the answers to the log questions is the mark scheme right
10. 70 for full UMS last june
11. (Original post by terry_011)
Log2(X) + Log2 (Y) = 8
Log2 (X^2/Y) = 7

something like that
Anyone else get 32 and 8 or something similar?
12. Was easy just made ****ty mistake on the last question.
13. (Original post by SAMBAN)
what were the answers to the log questions is the mark scheme right
2n-3 = 18000, that question n=17.1,
Simultaneous equations x = 32, y = 8
14. i got 6.35 and 0.31
15. (Original post by AstroNandos)
Anyone else get 32 and 8 or something similar?

Yeah i put 32 and 8
16. Thank you !!!!
17. What would the graph for question 9(iii) be look like?
18. Not entirely sure whether this is the place to ask but:

For the question to calculate N, I think my method was correct however in my quadratic formula my c value was 5500, when it should have been 5496, how many marks will I lose for this?

Also, could someone post their solution for the final question? Many thanks.
19. 1 or 2 marks
20. Yeah i put 32 and 8

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