Can Q1 equation not be n+1 divide by 4 as thats what i have been taught its abit confusing

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Well for example to find out the Q1 of a question the formula i have been taught is n+1 divde by 4 so if n is 11 I type in my calculator 11+1=12 divde by 4 which gives 3 but is this the corecct mathod and formula

Posted Sun 24th February, 2013 @ 13:36 by maryam