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    I'm just slightly confused about line 30, so would I just skip line 40.

    Could someone show me how to do the question please because I don't understand the markscheme.

    line 30 tests for evenness.. if A is even then skip line 40

    i don't do D1 but I think it means if the result of INT(A/2) is the same as A/2 (without INT) then go to line 50. so for example, since A = 20, INT(20/2) = 10 which is the same as 20/2 = 10, it will go to line 50. but if A was not an integer divisible by 2 then INT(A/2) would return a different value than A/2 (e.g. if A = 7, INT(7/2) = 3 but 7/2 = 3.5).
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Updated: December 25, 2014
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