Qualification > Queries
AS/ALEVEL EXAM DISCUSSION HERE ONLY
Reechna:
--- Quote from: kavish on November 09, 2009, 12:33:32 pm ---paper was relatively easy wish i revise could have got a better results but anyways can get above 60 i think :D
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really ??? well...congratz
Reechna:
--- Quote from: teju_777 on November 09, 2009, 11:55:56 am ---mine was between okay n good...few questions were horrible.... >:(
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did u really find it ok? :o
:-[
kavish:
gatouu told you it was okiz...u worked well also believe me ....i know what am saying :) after all 99.9% am ryt ;)
Lana Wolf:
--- Quote from: Reechna on November 09, 2009, 12:44:36 pm ---did u really find it ok? :o
:-[
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ya....i want to say what i found difficult...i'll reply to that aftr 24hrs... ;)
some q's wer really bad..others wer really good...lol.... :D
Tyserius:
--- Quote from: top_dog77 on November 09, 2009, 03:42:32 am ---I think I did the Chem P2 variant 2. I liked the organic chem + kinetic theory in it but not so much the oxidation numbers part, though I was lucky to have remembered the exception for metal hydrides.
Does anyone know the correct answer for the permutations Q in maths P6? It was the one that asked for for the different 3 digit and 4 digit numbers able to be produced from the numbers 1,3,5,6 and the digits formed had to be >500 as well as being odd numbers. So far I've heard varying answers
thanks
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Just so you know, the correct answer is 28. The way to calculate is as follows :
a) 3-digit cases
i) Beginning with 5,
5 _ _ --> The last blank will let you have 2 possibilities (1 and 3) and after putting 1 number the 2nd blank will have 2 possibilities (1 and 6 or 3 and 6 depending on your last digit) = 2 x 2 = 4
ii) Beginning with 6,
6 _ _ --> Last blank 3 possibilities (1,3 or 5) and after 1 number, 2nd blank will have 2 possibilities as 2 numbers left = 2 x 3 = 6
b) 4-digit case
_ _ _ _ --> The last blank must be an odd number (1,3 or 5), the other blanks can be arranged by any order = 3! x 3 (for the last blank) = 18
Total = 4 + 6 + 18 = 28
There's your answer! I forgot to consider odd digits for the 4-digit case ~_~ Careless me.
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